NASA astronaut Joe Acaba speaks about his time onboard the International Space Station, Friday, June 15, 2018 at NASA Headquarters in Washington. Acaba and astronaut Mark Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Joe Acaba speaks about his time onboard the International Space Station, Friday, June 15, 2018 at NASA Headquarters in Washington. Acaba and astronaut Mark Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Joe Acaba, left, and Mark Vande Hei, right, answer questions from the audience after speaking about their time onboard the International Space Station, Friday, June 15, 2018 at NASA Headquarters in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Mark Vande Hei speaks about his time onboard the International Space Station, Friday, June 15, 2018 at NASA Headquarters in Washington. Vande Hei and astronaut Joe Acaba answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Mark Vande Hei speaks about his time onboard the International Space Station, Friday, June 15, 2018 at NASA Headquarters in Washington. Vande Hei and astronaut Joe Acaba answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Joe Acaba, left, and Mark Vande Hei, right, answer questions from the audience after speaking about their time onboard the International Space Station, Friday, June 15, 2018 at NASA Headquarters in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Joe Acaba, left, and Mark Vande Hei, right, answer questions from the audience after speaking about their time onboard the International Space Station, Friday, June 15, 2018 at NASA Headquarters in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Joe Acaba, left, and Mark Vande Hei, right, answer questions from the audience after speaking about their time onboard the International Space Station, Friday, June 15, 2018 at NASA Headquarters in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Joe Acaba, left, and Mark Vande Hei, right, speak about their time onboard the International Space Station, Friday, June 15, 2018 at NASA Headquarters in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Joe Acaba, left, and Mark Vande Hei, right, answer questions from the audience after speaking about their time onboard the International Space Station, Friday, June 15, 2018 at NASA Headquarters in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Joe Acaba, left, and Mark Vande Hei, right, answer questions from the audience after speaking about their time onboard the International Space Station, Friday, June 15, 2018 at NASA Headquarters in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Joe Acaba answers an audience members question during "What's New in Aerospace," Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Acaba and astronaut Mark Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Mark Vande Hei answers an audience members question during "What's New in Aerospace," Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Vande Hei and astronaut Joe Acaba answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Mark Vande Hei, left, and Joe Acaba speak about their experiences onboard the International Space Station during "What's New in Aerospace," Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Joe Acaba answers an audience members question prior to a presentation, Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Acaba and astronaut Mark Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Mark Vande Hei, left, and Joe Acaba speak about their experiences onboard the International Space Station during "What's New in Aerospace," Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Mark Vande Hei, left, and Joe Acaba speak about their experiences onboard the International Space Station during "What's New in Aerospace," Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Joe Acaba, left, and Mark Vande Hei right, answer audience questions with the Smithsonian's Marty Kelsey, center, during "What's New in Aerospace," Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Joe Acaba speaks about his experiences onboard the International Space Station during "What's New in Aerospace," Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Acaba and astronaut Mark Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Mark Vande Hei answers an audience members question during "What's New in Aerospace," Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Vande Hei and astronaut Joe Acaba answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Mark Vande Hei, left, and Joe Acaba right, answer audience questions with the Smithsonian's Marty Kelsey, center, during "What's New in Aerospace," Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Mark Vande Hei, left, and Joe Acaba right, answer audience questions with the Smithsonian's Marty Kelsey, center, during "What's New in Aerospace," Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Mark Vande Hei, left, and Joe Acaba right, answer audience questions with the Smithsonian's Marty Kelsey, center, during "What's New in Aerospace," Thursday, June 14, 2018 at the Smithsonian National Air and Space Museum in Washington. Acaba and Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Joe Acaba, second from left, and Mark Vande Hei, right, visit the gravesite of former astronaut and U.S. Senator John Glenn, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
Attendees listen as NASA astronaut Mark Vande Hei speaks about his time onboard the International Space Station, Friday, June 15, 2018 at the DACOR Bacon House in Washington. The house is an early nineteenth century home and the current headquarters of DACOR Foundation, an organization of foreign affairs professionals. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Mark Vande Hei speaks about his time onboard the International Space Station, Friday, June 15, 2018 at the DACOR Bacon House in Washington. The house is an early nineteenth century home and the current headquarters of DACOR Foundation, an organization of foreign affairs professionals. Photo Credit: (NASA/Aubrey Gemignani)
Expedition 54 NASA astronauts Joe Acaba, left, and Mark Vande Hei meet with NASA Administrator Jim Bridenstine during their Expedition 54 post flight visit, Wednesday, June 13, 2018 at NASA Headquarters, Washington. Photo Credit: (NASA/Bill Ingalls)
NASA Administrator Jim Bridenstine, left, meets with Expedition 54 NASA astronauts Joe Acaba, right, and Mark Vande Hei, off camera, during their Expedition 54 post flight, Wednesday, June 13, 2018 at NASA Headquarters, Washington. Photo Credit: (NASA/Bill Ingalls)
NASA astronauts Joe Acaba, left, and Mark Vande Hei, right, speak about their time onboard the International Space Station, Friday, June 15, 2018 at the DACOR Bacon House in Washington. The house is an early nineteenth century home and the current headquarters of DACOR Foundation, an organization of foreign affairs professionals. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Joe Acaba speaks about his time onboard the International Space Station, Friday, June 15, 2018 at the DACOR Bacon House in Washington. The house is an early nineteenth century home and the current headquarters of DACOR Foundation, an organization of foreign affairs professionals. Photo Credit: (NASA/Aubrey Gemignani)
NASA Administrator Jim Bridenstine is seen as he meets with Expedition 54 NASA astronauts Joe Acaba and Mark Vande Hei during their Expedition 54 post flight, Wednesday, June 13, 2018 at NASA Headquarters, Washington. Photo Credit: (NASA/Bill Ingalls)
NASA astronauts Joe Acaba, left, and Mark Vande Hei, right, speak about their time onboard the International Space Station, Friday, June 15, 2018 at the DACOR Bacon House in Washington. The house is an early nineteenth century home and the current headquarters of DACOR Foundation, an organization of foreign affairs professionals. Photo Credit: (NASA/Aubrey Gemignani)
NASA Administrator Jim Bridenstine, center, meets with Expedition 54 NASA astronauts Mark Vande Hei, left, and Joe Acaba during their Expedition 54 post flight, Wednesday, June 13, 2018 at NASA Headquarters, Washington. Photo Credit: (NASA/Bill Ingalls)
NASA astronaut Mark Vande Hei speaks about his time onboard the International Space Station, Friday, June 15, 2018 at the DACOR Bacon House in Washington. The house is an early nineteenth century home and the current headquarters of DACOR Foundation, an organization of foreign affairs professionals. Photo Credit: (NASA/Aubrey Gemignani)
NASA Administrator Jim Bridenstine, left, meets with Expedition 54 NASA astronauts Joe Acaba, center, and Mark Vande Hei during their Expedition 54 post flight, Wednesday, June 13, 2018 at NASA Headquarters, Washington. Photo Credit: (NASA/Bill Ingalls)
The Space Shuttle Challenger Memorial is seen just after NASA astronaut Joe Acaba placed a flower there, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Mark Vande Hei and Joe Acaba attend the changing of the guards at the Tomb of the Unknown soldier, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
Attendees listen as NASA astronauts Joe Acaba and Mark Vande Hei speak about their time onboard the International Space Station, Friday, June 15, 2018 at the DACOR Bacon House in Washington. The house is an early nineteenth century home and the current headquarters of DACOR Foundation, an organization of foreign affairs professionals. Photo Credit: (NASA/Aubrey Gemignani)
NASA Administrator Jim Bridenstine, left, meets with Expedition 54 NASA astronauts Joe Acaba, center, and Mark Vande Hei during their Expedition 54 post flight, Wednesday, June 13, 2018 at NASA Headquarters, Washington. Photo Credit: (NASA/Bill Ingalls)
NASA astronaut Joe Acaba speaks about his time onboard the International Space Station, Friday, June 15, 2018 at the DACOR Bacon House in Washington. The house is an early nineteenth century home and the current headquarters of DACOR Foundation, an organization of foreign affairs professionals. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Joe Acaba, left, and Mark Vande Hei, right, watch as Julie Vande Hei, wife of Mark, takes a moment after placing a flower at the gravesite of former astronaut and U.S. Senator John Glenn, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA Administrator Jim Bridenstine, right, meets with Expedition 54 NASA astronauts Mark Vande Hei, left, and Joe Acaba during their Expedition 54 post flight, Wednesday, June 13, 2018 at NASA Headquarters, Washington. Photo Credit: (NASA/Bill Ingalls)
NASA astronaut Joe Acaba speaks about his time onboard the International Space Station, Friday, June 15, 2018 at the DACOR Bacon House in Washington. The house is an early nineteenth century home and the current headquarters of DACOR Foundation, an organization of foreign affairs professionals. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Mark Vande Hei, left, and Joe Acaba, center, meet with the Honor Guard at the Tomb of the Unknowns, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Joe Acaba, right, shakes hands with Lieutenant Colonel Jeffery Todd Burroughs, battalion commander, Old Guard, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
Tim Frank describes the history of the Tomb Guard to NASA astronauts Mark Vande Hei, left, and Joe Acaba, center, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Mark Vande Hei, left, and his wife Julie walk through the amphitheater at Arlington National Cemetery, Friday, June 15, 2018 in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Mark Vande Hei, left, and Joe Acaba, center, tour the museum at the Tomb of the Unknowns, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Joe Acaba, left, and Mark Vande Hei, right, meet with the Honor Guard at the Tomb of the Unknowns, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Joe Acaba, left, and Mark Vande Hei, right, watch as Julie Vande Hei, wife of Mark, places a flower at the gravesite of former astronaut and U.S. Senator John Glenn, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Mark Vande Hei places a flower at the Space Shuttle Columbia Memorial, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Joe Acaba, left, and Mark Vande Hei, right present a montage to the President of DACOR, Jim Benson, Friday, June 15, 2018 at the DACOR Bacon House in Washington. The house is an early nineteenth century home and the current headquarters of DACOR Foundation, an organization of foreign affairs professionals. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Joe Acaba places a flower at the Space Shuttle Challenger Memorial, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Mark Vande Hei, left, and his wife Julie visit the Space Shuttle Columbia memorial, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Joe Acaba speaks about his time onboard the International Space Station during a presentation to students at Walt Whitman Middle School, Thursday, June 14, 2018 in Alexandria, Va. Acaba and astronaut Mark Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Joe Acaba speaks about his time onboard the International Space Station during a presentation to students at Walt Whitman Middle School, Thursday, June 14, 2018 in Alexandria, Va. Acaba and astronaut Mark Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Joe Acaba, left, and Mark Vande Hei, right, present Walt Whitman Middle School Principal Craig Herring with a montage from their Expedition 54 mission, Thursday, June 14, 2018 in Alexandria, Va. Acaba and astronaut Mark Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Mark Vande Hei, left, and Joe Acaba answer questions during a presentation to students at Walt Whitman Middle School, Thursday, June 14, 2018 in Alexandria, Va. Acaba and astronaut Mark Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Mark Vande Hei, left, and Joe Acaba answer questions during a presentation to students at Walt Whitman Middle School, Thursday, June 14, 2018 in Alexandria, Va. Acaba and astronaut Mark Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronauts Mark Vande Hei, right, and Joe Acaba answer questions during a presentation to students at Walt Whitman Middle School, Thursday, June 14, 2018 in Alexandria, Va. Acaba and astronaut Mark Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Mark Vande Hei speaks about his time onboard the International Space Station during a presentation to students at Walt Whitman Middle School, Thursday, June 14, 2018 in Alexandria, Va. Vande Hei and astronaut Joe Acaba answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Mark Vande Hei speaks about his time onboard the International Space Station during a presentation to students at Walt Whitman Middle School, Thursday, June 14, 2018 in Alexandria, Va. Vande Hei and astronaut Joe Acaba answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Joe Acaba listens to a question from a student during a presentation at Walt Whitman Middle School, Thursday, June 14, 2018 in Alexandria, Va. Acaba and astronaut Mark Vande Hei answered questions from the audience and spoke about their experiences aboard the International Space Station for 168 days as part of Expedition 53 and 54. Photo Credit: (NASA/Joel Kowsky)
NASA astronaut Mark Vande Hei, center, his wife Julie, left, and NASA astronaut Joe Acaba witness the changing of the guards at the Tomb of the Unknown soldier, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Mark Vande Hei, center, his wife Julie, left, and NASA astronaut Joe Acaba witness the changing of the guards at the Tomb of the Unknown soldier, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Mark Vande Hei, left, and Joe Acaba, right, present Jerry Farnsworth, chief of staff at Arlington National Cemetery with a patch flown onboard the International Space Station during Expedition 54, Friday, June 15, 2018 in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Mark Vande Hei, left, and Joe Acaba, center, listen as Sergeant Craig Hudson explains the tradition of the Honor Guard at the Tomb of the Unknowns, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Mark Vande Hei, center, his wife Julie, left, and NASA astronaut Joe Acaba witness the changing of the guards at the Tomb of the Unknown soldier, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Mark Vande Hei, center, his wife Julie, right, and NASA astronaut Joe Acaba witness the changing of the guards at the Tomb of the Unknown soldier, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Mark Vande Hei, left, and Joe Acaba, right, present Jerry Farnsworth, chief of staff at Arlington National Cemetery with a montage from Expedition 54, Friday, June 15, 2018 in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Mark Vande Hei, left, and Joe Acaba, center, listen as Sergeant Craig Hudson explains the tradition of the Honor Guard at the Tomb of the Unknowns, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Mark Vande Hei, left, Julie Vande Hei, center, and Joe Acaba pose for a photo at the amphitheater at Arlington National Cemetery, Friday, June 15, 2018 in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Joe Acaba, left, and Mark Vande Hei visit the Space Shuttle Challenger and Columbia memorials, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Mark Vande Hei, left, and Joe Acaba, center, listen as Sergeant Craig Hudson explains the tradition of the Honor Guard at the Tomb of the Unknowns, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Mark Vande Hei, third from left, and Joe Acaba, third from right, meet with the Honor Guard at the Tomb of the Unknowns, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronauts Mark Vande Hei, center, and Joe Acaba, right, present Lieutenant Colonel Jeffery Todd Burroughs, battalion commander, Old Guard, and others from the Honor Guard with their patch that was flown onboard the International Space Station during Expedition 54, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)