At the Army Wharf at Cape Canaveral Air Force Station in Florida, the United Launch Alliance (ULA) Mariner cargo ship door is lowered on June 5, 2019, for offloading of the ULA Atlas V booster that will be used for Boeing’s Crew Flight Test (CFT). The Atlas V rocket will launch the CST-100 Starliner spacecraft and its crew, NASA astronauts Mike Fincke and Nicole Mann and Boeing astronaut Chris Ferguson, to the International Space Station for NASA’s Commercial Crew Program. The booster will be transported to the Atlas Spaceflight Operations Center to await the start of operations for its mission. The CFT will demonstrate Starliner and Atlas V’s ability to safely carry crew to and from the orbiting laboratory.

The United Launch Alliance (ULA) Atlas V booster that will be used for Boeing’s Crew Flight Test (CFT) is moved out of the Mariner cargo ship at the Army Wharf at Cape Canaveral Air Force Station in Florida on June 5, 2019. The ULA Atlas V rocket will launch the CST-100 Starliner and its crew, NASA astronauts Mike Fincke and Nicole Mann and Boeing astronaut Chris Ferguson, to the International Space Station for NASA’s Commercial Crew Program. The booster will be transported to the Atlas Spaceflight Operations Center to await the start of operations for its missions. The CFT will demonstrate Starliner and Atlas V’s ability to safely carry crew to and from the orbiting laboratory.

The United Launch Alliance (ULA) Atlas V booster that will be used for Boeing’s Crew Flight Test (CFT) is moved out of the Mariner cargo ship at the Army Wharf at Cape Canaveral Air Force Station in Florida on June 5, 2019. The ULA Atlas V rocket will launch the CST-100 Starliner and its crew, NASA astronauts Mike Fincke and Nicole Mann and Boeing astronaut Chris Ferguson, to the International Space Station for NASA’s Commercial Crew Program. The booster will be transported to the Atlas Spaceflight Operations Center to await the start of operations for its missions. The CFT will demonstrate Starliner and Atlas V’s ability to safely carry crew to and from the orbiting laboratory.

At the Army Wharf at Cape Canaveral Air Force Station in Florida, the United Launch Alliance (ULA) Mariner cargo ship door is lowered on June 5, 2019, for offloading of the ULA Atlas V booster that will be used for Boeing’s Crew Flight Test (CFT). The Atlas V rocket will launch the CST-100 Starliner spacecraft and its crew, NASA astronauts Mike Fincke and Nicole Mann and Boeing astronaut Chris Ferguson, to the International Space Station for NASA’s Commercial Crew Program. The booster will be transported to the Atlas Spaceflight Operations Center to await the start of operations for its mission. The CFT will demonstrate Starliner and Atlas V’s ability to safely carry crew to and from the orbiting laboratory.

The United Launch Alliance (ULA) Atlas V booster that will be used for Boeing’s Crew Flight Test (CFT) is moved out of the Mariner cargo ship at the Army Wharf at Cape Canaveral Air Force Station in Florida on June 5, 2019. The ULA Atlas V rocket will launch the CST-100 Starliner and its crew, NASA astronauts Mike Fincke and Nicole Mann and Boeing astronaut Chris Ferguson, to the International Space Station for NASA’s Commercial Crew Program. The booster will be transported to the Atlas Spaceflight Operations Center to await the start of operations for its missions. The CFT will demonstrate Starliner and Atlas V’s ability to safely carry crew to and from the orbiting laboratory.

The United Launch Alliance (ULA) Atlas V booster that will be used for Boeing’s Crew Flight Test (CFT) is moved out of the Mariner cargo ship at the Army Wharf at Cape Canaveral Air Force Station in Florida on June 5, 2019. The ULA Atlas V rocket will launch the CST-100 Starliner and its crew, NASA astronauts Mike Fincke and Nicole Mann and Boeing astronaut Chris Ferguson, to the International Space Station for NASA’s Commercial Crew Program. The booster will be transported to the Atlas Spaceflight Operations Center to await the start of operations for its missions. The CFT will demonstrate Starliner and Atlas V’s ability to safely carry crew to and from the orbiting laboratory.

The United Launch Alliance (ULA) Atlas V booster that will be used for Boeing’s Crew Flight Test (CFT) is moved out of the Mariner cargo ship at the Army Wharf at Cape Canaveral Air Force Station in Florida on June 5, 2019. The ULA Atlas V rocket will launch the CST-100 Starliner and its crew, NASA astronauts Mike Fincke and Nicole Mann and Boeing astronaut Chris Ferguson, to the International Space Station for NASA’s Commercial Crew Program. The booster will be transported to the Atlas Spaceflight Operations Center to await the start of operations for its missions. The CFT will demonstrate Starliner and Atlas V’s ability to safely carry crew to and from the orbiting laboratory.

NASA astronaut Barry “Butch” Wilmore, Boeing Crew Flight Test (CFT) commander, watches Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket roll out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

From left, NASA astronauts Barry “Butch” Wilmore and Suni Williams, Boeing Crew Flight Test (CFT) commander and pilot, speak with VIPs while watching Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket is seen on the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

NASA astronaut Barry “Butch” Wilmore, Boeing Crew Flight Test (CFT) commander, watches Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket roll out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

The United Launch Alliance (ULA) Atlas V booster that will be used for Boeing’s Crew Flight Test (CFT) nears the Atlas Spaceflight Operations Center (ASOC) at Cape Canaveral Air Force Station in Florida on June 5, 2019. The ULA Atlas V rocket will launch Starliner and its crew, NASA astronauts Mike Fincke and Nicole Mann and Boeing astronaut Chris Ferguson, to the International Space Station for NASA’s Commercial Crew Program. Inside the ASOC, the booster will await the start of operations for its missions. The CFT will demonstrate Starliner and Atlas V’s ability to safely carry crew to and from the orbiting laboratory.

The United Launch Alliance (ULA) Atlas V booster that will be used for Boeing’s Crew Flight Test (CFT) is backed into the Atlas Spaceflight Operations Center (ASOC) at Cape Canaveral Air Force Station in Florida on June 5, 2019. The ULA Atlas V rocket will launch Starliner and its crew, NASA astronauts Mike Fincke and Nicole Mann and Boeing astronaut Chris Ferguson, to the International Space Station for NASA’s Commercial Crew Program. Inside the ASOC, the booster will await the start of operations for its missions. The CFT will demonstrate Starliner and Atlas V’s ability to safely carry crew to and from the orbiting laboratory.

The United Launch Alliance (ULA) Atlas V booster that will be used for Boeing’s Crew Flight Test (CFT) nears the Atlas Spaceflight Operations Center (ASOC) at Cape Canaveral Air Force Station in Florida on June 5, 2019. The ULA Atlas V rocket will launch Starliner and its crew, NASA astronauts Mike Fincke and Nicole Mann and Boeing astronaut Chris Ferguson, to the International Space Station for NASA’s Commercial Crew Program. Inside the ASOC, the booster will await the start of operations for its missions. The CFT will demonstrate Starliner and Atlas V’s ability to safely carry crew to and from the orbiting laboratory.

The United Launch Alliance (ULA) Atlas V booster that will be used for Boeing’s Crew Flight Test (CFT) is being transported to the Atlas Spaceflight Operations Center (ASOC) at Cape Canaveral Air Force Station in Florida on June 5, 2019. The ULA Atlas V rocket will launch the CST-100 Starliner and its crew, NASA astronauts Mike Fincke and Nicole Mann and Boeing astronaut Chris Ferguson, to the International Space Station for NASA’s Commercial Crew Program. Inside the ASOC, the booster will await the start of operations for its missions. The CFT will demonstrate Starliner and Atlas V’s ability to safely carry crew to and from the orbiting laboratory.

NASA's Boeing Crew Flight Test (CFT) astronauts Barry "Butch" Wilmore and Sunita "Suni" Williams pose for a picture during T-38 pre-flight activities at Ellington Field.

Boeing CST-100 MOST CFT Ascent Sim for Eric Boe, Suni Williams and Barry "Butch" Wilmore.

Boeing CFT crew member Mike Fincke with backup Barry "Butch" Wilmore during Boeing CFT/59S BU ISS EVA Maintenance 1 PRF training.

Boeing CFT crew member Mike Fincke with backup Barry "Butch" Wilmore during Boeing CFT/59S BU ISS EVA Maintenance 1 PRF training.

Boeing CFT crew member Mike Fincke with backup Barry "Butch" Wilmore during Boeing CFT/59S BU ISS EVA Maintenance 1 PRF training.

Boeing CFT crew member Mike Fincke with backup Barry "Butch" Wilmore during Boeing CFT/59S BU ISS EVA Maintenance 1 PRF training.

Boeing Crew Flight Test (CFT) with NASA astronauts Mike Fincke and Nicole Mann and Boeing Astronaut Chris Ferguson during ISS EVA Prep & Post 1 training.

Boeing Crew Flight Test (CFT) with NASA astronauts Mike Fincke and Nicole Mann and Boeing Astronaut Chris Ferguson during ISS EVA Prep & Post 1 training.

Boeing Crew Flight Test (CFT) with NASA astronauts Mike Fincke and Nicole Mann and Boeing Astronaut Chris Ferguson during ISS EVA Prep & Post 1 training.

Boeing Crew Flight Test (CFT) with NASA astronauts Mike Fincke and Nicole Mann and Boeing Astronaut Chris Ferguson during ISS EVA Prep & Post 1 training.

Boeing Crew Flight Test (CFT) with NASA astronauts Mike Fincke and Nicole Mann and Boeing Astronaut Chris Ferguson during ISS EVA Prep & Post 1 training.

Boeing Crew Flight Test (CFT) with NASA astronauts Mike Fincke and Nicole Mann and Boeing Astronaut Chris Ferguson during ISS EVA Prep & Post 1 training.

Boeing Crew Flight Test (CFT) with NASA astronauts Mike Fincke and Nicole Mann and Boeing Astronaut Chris Ferguson during ISS EVA Prep & Post 1 training.

Boeing Crew Flight Test (CFT) with NASA astronauts Mike Fincke and Nicole Mann and Boeing Astronaut Chris Ferguson during ISS EVA Prep & Post 1 training.

Boeing Crew Flight Test (CFT) with NASA astronauts Mike Fincke and Nicole Mann and Boeing Astronaut Chris Ferguson during ISS EVA Prep & Post 1 training.

Boeing Crew Flight Test (CFT) with NASA astronauts Mike Fincke and Nicole Mann and Boeing Astronaut Chris Ferguson during ISS EVA Prep & Post 1 training.

The United Launch Alliance Atlas V rocket that will launch Boeing’s CST-100 Starliner on the Crew Flight Test (CFT) mission to the International Space Station for NASA’s Commercial Crew Program emerged from the factory on May 24, 2019, rolling into a giant cargo ship for transport to Cape Canaveral.

The United Launch Alliance Atlas V rocket that will launch Boeing’s CST-100 Starliner on the Crew Flight Test (CFT) mission to the International Space Station for NASA’s Commercial Crew Program emerged from the factory on May 24, 2019, rolling into a giant cargo ship for transport to Cape Canaveral.

The United Launch Alliance Atlas V rocket that will launch Boeing’s CST-100 Starliner on the Crew Flight Test (CFT) mission to the International Space Station for NASA’s Commercial Crew Program emerged from the factory on May 24, 2019, rolling into a giant cargo ship for transport to Cape Canaveral.

The United Launch Alliance Atlas V rocket that will launch Boeing’s CST-100 Starliner on the Crew Flight Test (CFT) mission to the International Space Station for NASA’s Commercial Crew Program emerged from the factory on May 24, 2019, rolling into a giant cargo ship for transport to Cape Canaveral.

Boeing Commercial Crew Flight Test (CFT) Emergency Vehicle Familiarization training with Chris Ferguson, Nicole Mann, Barry Wilmore and Mike Fincke.

Boeing Commercial Crew Flight Test (CFT) Emergency Vehicle Familiarization training with Chris Ferguson, Nicole Mann, Barry Wilmore and Mike Fincke.

NASA Administrator Jared Isaacman and NASA Associate Administrator Amit Kshatriya discuss a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket carrying a Boeing Starliner spacecraft launches NASA’s Boeing Crew Flight Test with NASA astronauts Butch Wilmore and Suni Williams aboard at 10:52 a.m. EDT Wednesday, June 5, 2024, from Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida. Wilmore and Williams are the first to launch aboard Boeing’s Starliner spacecraft to the International Space Station as part of the agency’s Commercial Crew Program.

A United Launch Alliance Atlas V rocket carrying a Boeing Starliner spacecraft launches NASA’s Boeing Crew Flight Test with NASA astronauts Butch Wilmore and Suni Williams aboard at 10:52 a.m. EDT Wednesday, June 5, 2024, from Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida. Wilmore and Williams are the first to launch aboard Boeing’s Starliner spacecraft to the International Space Station as part of the agency’s Commercial Crew Program.

A United Launch Alliance Atlas V rocket soars upward from the pad at Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida at 10:52 a.m. EDT Wednesday, June 5, 2024, carrying a Boeing Starliner spacecraft for NASA’s Boeing Crew Flight Test to the International Space Station. Aboard Starliner are NASA astronauts Butch Wilmore and Suni Williams on the first crewed flight of the spacecraft as part of the agency’s Commercial crew Program.

A United Launch Alliance Atlas V rocket soars upward from the pad at Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida at 10:52 a.m. EDT Wednesday, June 5, 2024, carrying a Boeing Starliner spacecraft for NASA’s Boeing Crew Flight Test to the International Space Station. Aboard Starliner are NASA astronauts Butch Wilmore and Suni Williams on the first crewed flight of the spacecraft as part of the agency’s Commercial crew Program.

A United Launch Alliance Atlas V rocket carrying a Boeing Starliner spacecraft launches NASA’s Boeing Crew Flight Test with NASA astronauts Butch Wilmore and Suni Williams aboard at 10:52 a.m. EDT Wednesday, June 5, 2024, from Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida. Wilmore and Williams are the first to launch aboard Boeing’s Starliner spacecraft to the International Space Station as part of the agency’s Commercial Crew Program.

A United Launch Alliance Atlas V rocket carrying a Boeing Starliner spacecraft launches NASA’s Boeing Crew Flight Test with NASA astronauts Butch Wilmore and Suni Williams aboard at 10:52 a.m. EDT Wednesday, June 5, 2024, from Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida. Wilmore and Williams are the first to launch aboard Boeing’s Starliner spacecraft to the International Space Station as part of the agency’s Commercial Crew Program.

A United Launch Alliance Atlas V rocket carrying a Boeing Starliner spacecraft launches NASA’s Boeing Crew Flight Test with NASA astronauts Butch Wilmore and Suni Williams aboard at 10:52 a.m. EDT Wednesday, June 5, 2024, from Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida. Wilmore and Williams are the first to launch aboard Boeing’s Starliner spacecraft to the International Space Station as part of the agency’s Commercial Crew Program.

NASA Administrator Jared Isaacman discusses a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jared Isaacman discusses a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jared Isaacman discusses a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Press Secretary Bethany Stevens moderates a news conference where NASA Administrator Jared Isaacman and NASA Associate Administrator Amit Kshatriya discussed a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Press Secretary Bethany Stevens looks on as NASA Administrator Jared Isaacman and NASA Associate Administrator Amit Kshatriya answer a question from a member of the media after discussing a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Associate Administrator Amit Kshatriya, alongside NASA Administrator Jared Isaacman, discusses a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jared Isaacman, alongside NASA Associate Administrator Amit Kshatriya, discusses a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jared Isaacman, alongside NASA Associate Administrator Amit Kshatriya, discusses a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Associate Administrator Amit Kshatriya looks on as NASA Administrator Jared Isaacman discusses a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jared Isaacman, alongside NASA Associate Administrator Amit Kshatriya, discusses a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jared Isaacman discusses a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Associate Administrator Amit Kshatriya, alongside NASA Administrator Jared Isaacman, discusses a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Associate Administrator Amit Kshatriya, alongside NASA Administrator Jared Isaacman, discusses a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Associate Administrator Amit Kshatriya discusses a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Associate Administrator Amit Kshatriya discuss a report of findings examining the Boeing CST-100 Starliner Crewed Flight Test, Thursday, Feb. 19, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

A crew transportation vehicle carrying NASA astronauts Suni Williams and Barry “Butch” Wilmore drives past the iconic Vehicle Assembly Building at the agency’s Kennedy Space Center in Florida on Wednesday, Jan. 31, 2024, as part of an integrated crew exercise simulation for NASA’s Boeing Crew Flight Test (CFT). The integrated exercise involved participation from the flight crew, NASA, Boeing, and United Launch Alliance (ULA), and allowed teams to rehearse prelaunch operations beginning roughly four hours before a targeted liftoff. CFT will be the first flight with astronauts to the International Space Station for Boeing’s Starliner spacecraft as part of NASA’s Commercial Crew Program. Starliner is scheduled to launch atop ULA’s Atlas V rocket no earlier than mid-April 2024.

A crew transportation vehicle carrying NASA astronauts Suni Williams and Barry “Butch” Wilmore drives past the iconic Vehicle Assembly Building at the agency’s Kennedy Space Center in Florida on Wednesday, Jan. 31, 2024, as part of an integrated crew exercise simulation for NASA’s Boeing Crew Flight Test (CFT). The integrated exercise involved participation from the flight crew, NASA, Boeing, and United Launch Alliance (ULA), and allowed teams to rehearse prelaunch operations beginning roughly four hours before a targeted liftoff. CFT will be the first flight with astronauts to the International Space Station for Boeing’s Starliner spacecraft as part of NASA’s Commercial Crew Program. Starliner is scheduled to launch atop ULA’s Atlas V rocket no earlier than mid-April 2024.

A crew transportation vehicle carrying NASA astronauts Suni Williams and Barry “Butch” Wilmore drives past the iconic Vehicle Assembly Building at the agency’s Kennedy Space Center in Florida on Wednesday, Jan. 31, 2024, as part of an integrated crew exercise simulation for NASA’s Boeing Crew Flight Test (CFT). The integrated exercise involved participation from the flight crew, NASA, Boeing, and United Launch Alliance (ULA), and allowed teams to rehearse prelaunch operations beginning roughly four hours before a targeted liftoff. CFT will be the first flight with astronauts to the International Space Station for Boeing’s Starliner spacecraft as part of NASA’s Commercial Crew Program. Starliner is scheduled to launch atop ULA’s Atlas V rocket no earlier than mid-April 2024.

NASA’s Boeing Crew Flight Test astronauts Butch Wilmore and Suni Williams walk out of the Neil A. Armstrong Operations and Checkout Building during a launch attempt on Saturday, June 1, 2024, at the agency’s Kennedy Space Center in Florida. The crew members will be the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft atop a United Launch Alliance Atlas V rocket from Space Launch Complex-41 at nearby Cape Canaveral Space Force Station. Liftoff was scheduled for 12:25 p.m. EDT but scrubbed for the day.

NASA’s Boeing Crew Flight Test astronaut Butch Wilmore says goodbye to friends and family upon exiting the Neil A. Armstrong Operations and Checkout Building at NASA’s Kennedy Space Center in Florida ahead of a launch attempt on Saturday, June 1, 2024. Wilmore, accompanied by NASA astronaut Suni Williams, will be the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft atop a United Launch Alliance Atlas V rocket from Space Launch Complex-41 at nearby Cape Canaveral Space Force Station. Liftoff was scheduled for 12:25 p.m. EDT but scrubbed for the day.

NASA’s Boeing Crew Flight Test astronaut Suni Williams waves to friends and family upon exiting the Neil A. Armstrong Operations and Checkout Building at NASA’s Kennedy Space Center in Florida during a launch attempt on Saturday, June 1, 2024. Williams, accompanied by NASA astronaut Butch Wilmore, will be the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft atop a United Launch Alliance Atlas V rocket from Space Launch Complex-41 at nearby Cape Canaveral Space Force Station. Liftoff was scheduled for 12:25 p.m. EDT but scrubbed for the day.

NASA’s Boeing Crew Flight Test astronauts Butch Wilmore and Suni Williams walk out of the Neil A. Armstrong Operations and Checkout Building during a launch attempt on Saturday, June 1, 2024, at the agency’s Kennedy Space Center in Florida. The crew members will be the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft atop a United Launch Alliance Atlas V rocket from Space Launch Complex-41 at nearby Cape Canaveral Space Force Station. Liftoff was scheduled for 12:25 p.m. EDT but scrubbed for the day.

A United Launch Alliance (ULA) Atlas V booster for Boeing's CST-100 Starliner Crew Flight Test (CFT) is loaded onto a rocket-delivery ship at ULA’s manufacturing factory in Decatur, Alabama, on June 11, 2021, to begin its journey to Cape Canaveral, Florida. Starliner’s first flight with astronauts aboard, CFT will launch from Space Launch Complex 41 at Cape Canaveral Space Force Station in Florida. The flight test will demonstrate the ability of the Atlas V and Starliner to safely carry astronauts to and from the International Space Station for the agency’s Commercial Crew Program.

A flatbed truck moves the United Launch Alliance (ULA) Atlas V booster and Centaur upper stage for Boeing's CST-100 Starliner Crew Flight Test (CFT) inside the Atlas Spaceflight Operations Center at Space Launch Complex 41 (SLC-41) at Cape Canaveral Space Force Station on June 21, 2021. Starliner's first flight with astronauts aboard, CFT will launch from SLC-41. The flight test will demonstrate the ability of the Atlas V and Starliner to safely carry astronauts to and from the International Space Station for the agency's Commercial Crew Program.

A flatbed truck delivers the United Launch Alliance (ULA) Atlas V booster and Centaur upper stage for Boeing's CST-100 Starliner Crew Flight Test (CFT) to the Atlas Spaceflight Operations Center at Space Launch Complex 41 (SLC-41) at Cape Canaveral Space Force Station on June 21, 2021. Starliner's first flight with astronauts aboard, CFT will launch from SLC-41. The flight test will demonstrate the ability of the Atlas V and Starliner to safely carry astronauts to and from the International Space Station for the agency's Commercial Crew Program.

The United Launch Alliance (ULA) Atlas V booster and Centaur upper stage for Boeing's CST-100 Starliner Crew Flight Test (CFT) are inside the Atlas Spaceflight Operations Center at Space Launch Complex 41 (SLC-41) at Cape Canaveral Space Force Station on June 21, 2021. Starliner's first flight with astronauts aboard, CFT will launch from SLC-41. The flight test will demonstrate the ability of the Atlas V and Starliner to safely carry astronauts to and from the International Space Station for the agency's Commercial Crew Program.

The United Launch Alliance (ULA) Atlas V booster and Centaur upper stage for Boeing's CST-100 Starliner Crew Flight Test (CFT) are unloaded from a rocket-delivery ship at Cape Canaveral Space Force Station on June 21, 2021. Starliner's first flight with astronauts aboard, CFT will launch from Space Launch Complex 41 at Cape Canaveral Space Force Station in Florida. The flight test will demonstrate the ability of the Atlas V and Starliner to safely carry astronauts to and from the International Space Station for the agency's Commercial Crew Program.

The United Launch Alliance (ULA) Atlas V booster and Centaur upper stage for Boeing's CST-100 Starliner Crew Flight Test (CFT) arrive at the Atlas Spaceflight Operations Center at Space Launch Complex 41 (SLC-41) at Cape Canaveral Space Force Station on June 21, 2021. Starliner's first flight with astronauts aboard, CFT will launch from SLC-41. The flight test will demonstrate the ability of the Atlas V and Starliner to safely carry astronauts to and from the International Space Station for the agency's Commercial Crew Program.

The United Launch Alliance (ULA) Atlas V booster and Centaur upper stage for Boeing's CST-100 Starliner Crew Flight Test (CFT) are on their way to the Atlas Spaceflight Operations Center at Space Launch Complex 41 (SLC-41) at Cape Canaveral Space Force Station on June 21, 2021. Starliner's first flight with astronauts aboard, CFT will launch from SLC-41. The flight test will demonstrate the ability of the Atlas V and Starliner to safely carry astronauts to and from the International Space Station for the agency's Commercial Crew Program.

The United Launch Alliance (ULA) Atlas V booster and Centaur upper stage for Boeing's CST-100 Starliner Crew Flight Test (CFT) are unloaded from a rocket-delivery ship at Cape Canaveral Space Force Station on June 21, 2021. Starliner's first flight with astronauts aboard, CFT will launch from Space Launch Complex 41 at Cape Canaveral Space Force Station in Florida. The flight test will demonstrate the ability of the Atlas V and Starliner to safely carry astronauts to and from the International Space Station for the agency's Commercial Crew Program.

The United Launch Alliance (ULA) Atlas V booster and Centaur upper stage for Boeing's CST-100 Starliner Crew Flight Test (CFT) are on their way to the Atlas Spaceflight Operations Center at Space Launch Complex 41 (SLC-41) at Cape Canaveral Space Force Station on June 21, 2021. Starliner's first flight with astronauts aboard, CFT will launch from SLC-41. The flight test will demonstrate the ability of the Atlas V and Starliner to safely carry astronauts to and from the International Space Station for the agency's Commercial Crew Program.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket is seen on the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket is seen on the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket is seen on the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket is seen on the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing’s Starliner spacecraft atop the United Launch Alliance Atlas V rocket rolls out from the Vertical Integration Facility to the launch pad of Space Launch Complex-41 at Cape Canaveral Space Force Station in Florida on Saturday, May 4, 2024, ahead of NASA’s Boeing Crew Flight Test. As part of the agency’s Commercial Crew Program, NASA astronauts Butch Wilmore and Suni Williams are the first to launch to the International Space Station aboard Boeing’s Starliner spacecraft. Liftoff is scheduled for 10:34 p.m. ET Monday, May 6.

Boeing CFT crew member Mike Fincke with backup Barry "Butch" Wilmore during Boeing CFT/59S BU ISS EVA Maintenance 1 PRF training.

Boeing CFT crew member Mike Fincke with backup Barry "Butch" Wilmore during Boeing CFT/59S BU ISS EVA Maintenance 1 PRF training.

Boeing CFT crew member Mike Fincke with backup Barry "Butch" Wilmore during Boeing CFT/59S BU ISS EVA Maintenance 1 PRF training.

The Starliner team, including the crane crew, monitors the lift of the crew module on Jan. 19, 2023, at Boeing’s Commercial Crew and Cargo Processing Facility before it is mated onto the new service module ahead of NASA’s Boeing Crew Flight Test.

The Starliner crew module is hoisted in Boeing’s Commercial Crew and Cargo Processing Facility on Jan. 19, 2023 before being mated to a new service module for NASA’s Boeing Crew Flight Test.

The Starliner team works to finalize the mate of the crew module and new service module for NASA's Boeing Crew Flight Test that will take NASA astronauts Barry “Butch” Wilmore and Sunita “Suni” Williams to and from the International Space Station.

NASA astronauts Barry “Butch” Wilmore and Mike Fincke monitor the launch portion of an integrated mission dress rehearsal of Boeing’s uncrewed Orbital Flight Test-2 (OFT-2) from Boeing’s Houston-based Avionics and Software Integration Lab on Thursday, April 22, 2021. Along with NASA astronaut Nicole Mann, Wilmore and Fincke will fly aboard Boeing’s CST-100 Starliner spacecraft for the company’s Crew Flight Test (CFT) as part of NASA’s Commercial Crew Program.

NASA astronaut Barry “Butch” Wilmore, Boeing Crew Flight Test (CFT) commander, checks his helmet during a crew validation test inside the Astronaut Crew Quarters at NASA’s Kennedy Space Center in Florida on Oct. 18, 2022. Wilmore, along with NASA astronauts Suni Williams, CFT pilot, and Mike Fincke, CFT backup spacecraft test pilot, with assistance from the Boeing team, successfully completed the validation test during which they suited up and tested out the pressurized crew module to ensure seat fit, suit functionality, cabin temperature, audio system, and day of launch operations. Boeing’s CFT is scheduled to launch in April 2023.