NASA Administrator Jim Bridenstine climbs out of a mockup of the Demo-2 Crew Dragon during a tour of the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine answers a question from the press in front of the Crew Dragon that is being prepared for the Demo-2 mission, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, left, speaks to press with SpaceX Chief Engineer Elon Musk, second from left, NASA astronaut Doug Hurley, second from right, and NASA astronaut Bob Behnken, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

SpaceX Chief Engineer Elon Musk, right, speaks to press with NASA Administrator Jim Bridenstine, in front of the Crew Dragon that is being prepared for the Demo-2 mission, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, right, participates in a crew Dragon flight simulation with NASA astronaut Doug Hurley, who will be flying aboard the Crew Dragon during the Demo-2 mission, while SpaceX Chief Engineer Elon Musk looks on, at the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, left, and SpaceX Chief Engineer Elon Musk, right, speak to press in front of the Crew Dragon that is being prepared for the Demo-2 mission, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, right, participates in a Crew Dragon flight simulation with NASA astronauts Doug Hurley, center, and Bob Behnken, left, who will be flying aboard the Crew Dragon during the Demo-2 mission, at the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, center, speaks with SpaceX employees during a tour of the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

SpaceX Chief Engineer Elon Musk signs a banner after discussing progress on the Commercial Crew Program with NASA Administrator Jim Bridenstine at the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

SpaceX Chief Engineer Elon Musk signs a banner after discussing progress on the Commercial Crew Program with NASA Administrator Jim Bridenstine at the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, right, sits in a mockup of the Demo-2 Crew Dragon with NASA astronaut Bob Behnken during a tour of the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, right, speaks to Joseph Petrzelka of SpaceX about the Dragon capsule that will launch during the Demo-2 mission while on a tour of the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, left, speaks to press with SpaceX Chief Engineer Elon Musk, second from left, NASA astronaut Doug Hurley, second from right, and NASA astronaut Bob Behnken, in front of the Crew Dragon that is being prepared for the Demo-2 mission, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, right, speaks to SpaceX Vice President of Propulsion Engineering, Will Heltsley, about engine hardware during a tour of the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA astronaut Bob Behnken answers a question from the media in front of the Crew Dragon that is being prepared for the Demo-2 mission, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Behnken and NASA astronaut Doug Hurley are assigned to fly onboard Crew Dragon for the Demo-2 mission.Photo credit: (NASA/Aubrey Gemignani)

NASA astronaut Bob Behnken answers a question from the media in front of the Crew Dragon that is being prepared for the Demo-2 mission, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Behnken and NASA astronaut Doug Hurley are assigned to fly onboard Crew Dragon for the Demo-2 mission.Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, right, speaks to Joseph Petrzelka of SpaceX about the Dragon capsule that will launch during the Demo-2 mission while on a tour of the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA astronaut Doug Hurley answers a question from the media in front of the Crew Dragon that is being prepared for the Demo-2 mission, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Hurley and NASA astronaut Bob Behnken are assigned to fly onboard Crew Dragon for the Demo-2 mission. Photo credit: (NASA/Aubrey Gemignani)

NASA astronaut Doug Hurley answers a question from the media in front of the Crew Dragon that is being prepared for the Demo-2 mission, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Hurley and NASA astronaut Bob Behnken are assigned to fly onboard Crew Dragon for the Demo-2 mission. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, left, and SpaceX Chief Engineer Elon Musk, right, speak to press in front of the Crew Dragon that is being prepared for the Demo-2 mission, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, right, speaks to SpaceX Chief Engineer Elon Musk, during a tour of the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, right, participates in a crew Dragon flight simulation with NASA astronauts Doug Hurley, who will be flying aboard the Crew Dragon during the Demo-2 mission, at the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

A view of one of the SpaceX suits that will be used for the Demo-2 launch at the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, left, speaks to press with SpaceX Chief Engineer Elon Musk, second from left, NASA astronaut Doug Hurley, second from right, and NASA astronaut Bob Behnken, in front of the Crew Dragon that is being prepared for the Demo-2 mission, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

SpaceX Chief Engineer Elon Musk, right, speaks to NASA Administrator Jim Bridenstine, center, and SpaceX Vice President of Propulsion Engineering, Will Heltsley, left, while viewing the OctaWeb, part of the Merlin engine used for the Falcon rockets, at the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, left, speaks with SpaceX employees working on Super Draco engines during a tour of the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

SpaceX Chief Engineer Elon Musk answers a question from the press in front of the Crew Dragon that is being prepared for the Demo-2 mission, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, signs a banner during a tour of the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, center, participates in a crew Dragon flight simulation with NASA astronauts Doug Hurley, and Bob Behnken, while SpaceX Chief Engineer Elon Musk looks on, at the SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine answers a question from the press in front of the Crew Dragon that is being prepared for the Demo-2 mission, at SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Photo credit: (NASA/Aubrey Gemignani)

SpaceX Chief Engineer Elon Musk, second from right, and NASA astronaut Bob Behnken, right, look on as NASA Administrator Jim Bridenstine, third from left, speaks to NASA astronaut Doug Hurley, left, as they look at an identical version of the SpaceX spacesuit that he will wear for the Demo-2 mission during a visit to SpaceX Headquarters, Thursday, Oct. 10, 2019 in Hawthorne, CA. Behnken and Hurley are assigned to fly onboard Crew Dragon for the Demo-2 mission. Photo credit: (NASA/Aubrey Gemignani)

Bob Behnken - Individual portrait photos of SpaceX Crew Flight Test (Demo-2) crew & backup crews.

Mike Hopkins - Individual portrait photos of SpaceX Crew Flight Test (Demo-2) crew & backup crews.

Astronauts Eric Boe, right, and Bob Behnken work in a mock-up of the SpaceX Crew Dragon flight deck at the company's Hawthorne, California, headquarters as development of the crew systems continues for eventual missions to the International Space Station.

Victor Glover - Individual portrait photos of SpaceX Crew Flight Test (Demo-2) crew & backup crews.

Astronauts Bob Behnken, left, and Eric Boe work in a mock-up of the SpaceX Crew Dragon flight deck at the company's Hawthorne, California, headquarters as development of the crew systems continues for eventual missions to the International Space Station.

Doug Hurley - Individual portrait photos of SpaceX Crew Flight Test (Demo-2) crew & backup crews.

Victor Glover - Individual portrait photos of SpaceX Crew Flight Test (Demo-2) crew & backup crews.

Bob Behnken - Individual portrait photos of SpaceX Crew Flight Test (Demo-2) crew & backup crews.

Astronauts Bob Behnken, left, and Eric Boe work in a mock-up of the SpaceX Crew Dragon flight deck at the company's Hawthorne, California, headquarters as development of the crew systems continues for eventual missions to the International Space Station.

Astronaut Bob Behnken, work in a mock-up of the SpaceX Crew Dragon flight deck at the company's Hawthorne, California, headquarters as development of the crew systems continues for eventual missions to the International Space Station.

Mike Hopkins - Individual portrait photos of SpaceX Crew Flight Test (Demo-2) crew & backup crews.

Group portrait photos of SpaceX Crew Flight Test (Demo-2) crew & backup crews - From left to right: Victor Glover, Mike Hopkins, Doug Hurley and Bob Behnken.

Doug Hurley - Individual portrait photos of SpaceX Crew Flight Test (Demo-2) crew & backup crews.