A wreath is on display at the Space Mirror Memorial at NASA’s Kennedy Space Center Visitor Complex in Florida during the annual Day of Remembrance ceremony on Thursday, Jan. 25, 2024, honoring fallen astronauts who lost their lives while furthering the cause of exploration and discovery including the crews of Apollo 1, Challenger STS-51L, and Columbia STS-107.

Burt Summerfield, associate director, management, at NASA’s Kennedy Space Center in Florida, speaks as part of the agency’s Day of Remembrance on Thursday, Jan. 25, 2024, at the Space Mirror Memorial at Kennedy Space Center Visitor Complex. The annual tradition honors fallen astronauts and astronaut candidates who lost their lives while furthering the cause of exploration and discovery.

Astronauts Memorial Foundation board member Karen Bassett Stevenson and daughter of Charles Bassett II, delivers remarks honoring fallen astronauts who lost their lives while furthering the cause of exploration and discovery during NASA’s annual Day of Remembrance on Thursday, Jan. 25, 2024, at the Space Mirror Memorial at the agency’s Kennedy Space Center Visitor Complex in Florida. Those remembered include the crews of Apollo 1, Challenger STS-51L, and Columbia STS-107.

Family members of fallen astronauts Kathie Scobee Fulgham, Lowell Grissom, Sheryl Chaffee, and Karen Bassett Stevenson place a wreath at the Space Mirror Memorial at NASA’s Kennedy Space Center Visitor Complex in Florida on Thursday, Jan. 25, 2024, during the agency’s Day of Remembrance. The annual tradition pays tribute to fallen astronauts and astronaut candidates who lost their lives while furthering the cause of exploration and discovery, including the crews of Apollo 1, Challenger STS-51L, and Columbia STS-107.

Kathie Scobee Fulgham, Astronauts Memorial Foundation chair and daughter of Challenger astronaut Francis “Dick” Scobee, delivers remarks honoring fallen astronauts who lost their lives while furthering the cause of exploration and discovery during NASA’s annual Day of Remembrance on Thursday, Jan. 25, 2024, at the Space Mirror Memorial at the agency’s Kennedy Space Center Visitor Complex in Florida. Those remembered include the crews of Apollo 1, Challenger STS-51L, and Columbia STS-107.

Burt Summerfield, associate director, management, at NASA’s Kennedy Space Center in Florida, and Kathie Scobee Fugham, chairman of the Astronauts Memorial Foundation and daughter of Commander Francis “Dick” Scobee, honor astronauts and astronaut candidates who lost their lives while furthering the cause of exploration and discovery during the annual Day of Remembrance ceremony on Thursday, Jan. 25, 2024, held at the Space Mirror Memorial at NASA’s Kennedy Space Center Visitor Complex in Florida. Family members of fallen astronauts hold roses remembering their loved ones, while guests hold carnations to pay their respects.

The Space Shuttle Columbia memorial is seen after a wreath laying ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Leadership and staff participate in a wreath laying ceremony at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

From left to right, NASA Administrator Bill Nelson, NASA Deputy Administrator Pam Melroy, and Deputy Chief of Mission for the Embassy of Israel Eliav Benjamin, place wreaths at the Space Shuttle Columbia Memorial during a ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

From left to right, NASA Deputy Administrator Pam Melroy, NASA Associate Administrator Jim Free, and NASA Administrator Bill Nelson are seen during a wreath laying ceremony, as a part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Administrator Bill Nelson speaks during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Bill Nelson delivers remarks after laying a wreath at the Apollo 1 Memorial during a ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Associate Administrator Jim Free answers a question during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Bill Nelson and NASA Deputy Administrator Pam Melroy deliver remarks at the Space Shuttle Columbia and Space Shuttle Challenger Memorial’s during a wreath laying ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Administrator Bill Nelson and NASA Deputy Administrator Pam Melroy lay a wreath at the Space Shuttle Challenger Memorial during a ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Administrator Bill Nelson speaks during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Bill Nelson, left, and NASA Deputy Administrator Pam Melroy, right, lay a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

A wreath is seen by the Space Shuttle Challenger Memorial during a wreath laying ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Administrator Bill Nelson speaks during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Bill Nelson and NASA Deputy Administrator Pam Melroy deliver remarks at the Space Shuttle Columbia and Space Shuttle Challenger Memorial’s during a wreath laying ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Deputy Administrator Pam Melroy answers a question during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

Flowers are seen at the grave marker of Roger Chaffee from Apollo 1 after NASA Administrator Bill Nelson and Deputy Administrator Pam Melroy placed them there during a ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

A wreath placed by NASA Administrator Bill Nelson and NASA Deputy Administrator Pam Melroy is seen at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

From left to right, NASA Associate Administrator Jim Free, NASA Administrator Bill Nelson and NASA Deputy Administrator Pam Melroy are seen during a wreath laying ceremony, as a part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Administrator Bill Nelson is escorted to the Tomb of the Unknowns for a wreath laying ceremony by Executive Director of the Office of Army Cemeteries, Karen Durham-Aguilera, as part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Administrator Bill Nelson speaks with Executive Director of the Office of Army Cemeteries, Karen Durham-Aguilera, prior to a wreath laying ceremony as part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Associate Administrator Jim Free speaks on a panel with NASA Administrator Bill Nelson, seated left, and NASA Deputy Administrator Pam Melroy, seated right, during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Bill Nelson answers a question during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Bill Nelson, NASA Deputy Administrator Pam Melroy, and Columbia astronaut William McCool’s family friend Kristy Carroll help place a lei at the Space Shuttle Columbia Memorial during a wreath laying ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Deputy Administrator Pam Melroy speaks during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Deputy Administrator Pam Melroy speaks during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Bill Nelson and NASA Deputy Administrator Pam Melroy place flowers at the grave markers of Virgil "Gus" Grissom and Roger Chaffee from Apollo 1, during a ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Administrator Bill Nelson speaks during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Deputy Administrator Pam Melroy speaks during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Associate Administrator Jim Free speaks during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Associate Administrator Jim Free speaks during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

Flowers are seen at the grave marker of Virgil "Gus" Grissom from Apollo 1 after NASA Administrator Bill Nelson and Deputy Administrator Pam Melroy placed them there during a ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Administrator Bill Nelson and NASA Deputy Administrator Pam Melroy deliver remarks at the Space Shuttle Columbia and Space Shuttle Challenger Memorial’s during a wreath laying ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

A member of The Old Guard, 3rd U.S. Infantry Regiment is seen during a wreath laying ceremony as part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Administrator Bill Nelson and NASA Deputy Administrator Pam Melroy place flowers at the grave markers of Virgil "Gus" Grissom and Roger Chaffee from Apollo 1, during a ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Deputy Administrator Pam Melroy answers a question during a NASA Safety Town Hall, Tuesday, Jan. 23, 2024 at the Mary W. Jackson NASA Headquarters building in Washington. The Safety Town Hall is held annually near the Day of Remembrance to learn from past errors and pay tribute to those that lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Bill Nelson, NASA Deputy Administrator Pam Melroy, and Columbia astronaut William McCool’s family friend Kristy Carroll help place a lei at the Space Shuttle Columbia Memorial during a wreath laying ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

Flowers are seen at the grave marker of Roger Chaffee from Apollo 1 after NASA Administrator Bill Nelson and Deputy Administrator Pam Melroy placed them there during a ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

From left to right, NASA Administrator Bill Nelson, NASA Associate Administrator Jim Free, and NASA Deputy Administrator Pam Melroy, are seen following a wreath laying ceremony, as a part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Administrator Bill Nelson and NASA Deputy Administrator Pam Melroy place flowers at the grave markers of Virgil "Gus" Grissom and Roger Chaffee from Apollo 1, during a ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)