Pascale Ehrenfreund, Chair of the Executive Board of the German Aerospace Center (DLR) is seen during a meeting with NASA Administrator Jim Bridenstine, Deputy Administrator Jim Morhard and other senior NASA leaders at the 70th International Astronautical Congress, Wednesday, Oct. 23, 2019 in Washington. Photo Credit: (NASA/Joel Kowsky)

German Aerospace Center (DLR) executive board chair, Dr. Pascale Ehrenfreund, center, speaks with NASA Administrator Jim Bridenstine about the robust relationship between their agencies in human and robotic exploration, and prospects for cooperation as NASA pursues the landing of humans on the Moon by 2024, at the Space Symposium, Wednesday, April 10, 2019 in Colorado Springs, Colorado. Photo Credit: (NASA/Aubrey Gemignani)

German Aerospace Center (DLR) executive board chair, Dr. Pascale Ehrenfreund, left, and Walther Pelzer, DLR executive board member, speak with NASA Administrator Jim Bridenstine about the robust relationship between their agencies in human and robotic exploration, and prospects for cooperation as NASA pursues the landing of humans on the Moon by 2024, at the Space Symposium, Wednesday, April 10, 2019 in Colorado Springs, Colorado. Photo Credit: (NASA/Aubrey Gemignani)

German Aerospace Center (DLR) executive board chair, Dr. Pascale Ehrenfreund, center, speaks with NASA Administrator Jim Bridenstine about the robust relationship between their agencies in human and robotic exploration, and prospects for cooperation as NASA pursues the landing of humans on the Moon by 2024, at the Space Symposium, Wednesday, April 10, 2019 in Colorado Springs, Colorado. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, right, and Deputy Administrator Jim Morhard, are seen during a meeting with Pascale Ehrenfreund, Chair of the Executive Board of the German Aerospace Center (DLR) and other members of the executive board at the 70th International Astronautical Congress, Wednesday, Oct. 23, 2019 in Washington. Photo Credit: (NASA/Joel Kowsky)

German Aerospace Center (DLR) executive board chair, Dr. Pascale Ehrenfreund, speaks with NASA Administrator Jim Bridenstine about the robust relationship between their agencies in human and robotic exploration, and prospects for cooperation as NASA pursues the landing of humans on the Moon by 2024, at the Space Symposium, Wednesday, April 10, 2019 in Colorado Springs, Colorado. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine speaks with German Aerospace Center (DLR) executive board chair, Dr. Pascale Ehrenfreund, about the robust relationship between their agencies in human and robotic exploration, and prospects for cooperation as NASA pursues the landing of humans on the Moon by 2024, at the Space Symposium, Wednesday, April 10, 2019 in Colorado Springs, Colorado. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, left, poses for a photo with German Aerospace Center (DLR) executive board chair, Dr. Pascale Ehrenfreund after meeting to discuss the robust relationship between their agencies in human and robotic exploration, and prospects for cooperation as NASA pursues the landing of humans on the Moon by 2024, at the Space Symposium, Wednesday, April 10, 2019 in Colorado Springs, Colorado. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, right, speaks with German Aerospace Center (DLR) executive board chair, Dr. Pascale Ehrenfreund, about the robust relationship between their agencies in human and robotic exploration, and prospects for cooperation as NASA pursues the landing of humans on the Moon by 2024, at the Space Symposium, Wednesday, April 10, 2019 in Colorado Springs, Colorado. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, center left, Deputy Administrator Jim Morhard, Ken Bowersox, acting Associate Administrator for NASA's Human Exploration and Operations Mission Directorate, Thomas Zurbuchen, Associate Administrator of NASA's Science Mission Directorate, meet with Pascale Ehrenfreund, Chair of the Executive Board of the German Aerospace Center (DLR) and other members of the executive board at the 70th International Astronautical Congress, Wednesday, Oct. 23, 2019 in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jim Bridenstine, right, and Deputy Administrator Jim Morhard listen as German Aerospace Center (DLR) executive board chair, Dr. Pascale Ehrenfreund, speaks about the robust relationship between their agencies in human and robotic exploration, and prospects for cooperation as NASA pursues the landing of humans on the Moon by 2024, at the Space Symposium, Wednesday, April 10, 2019 in Colorado Springs, Colorado. Photo Credit: (NASA/Aubrey Gemignani)

Pascale Ehrenfreund, Incoming President of the International Astronautical Federation (IAF), left, and Jean-Yves Le Gall, President of International Astronautical Federation (IAF), second from left, facilitate a panel with NASA Administrator Jim Bridenstine, Johann-Dietrich Woerner, Director General of ESA (European Space Agency), Hiroshi Yamakawa, President of the Japan Aerospace Exploration Agency (JAXA), Sylvain Laporte, President of the Canadian Space Agency, Sergey Krikalev, Executive Director for Piloted Spaceflights for Roscosmos, and S. Somanath, Director of Vikram Sarabhai Space Centre, Indian Space Research Organization (ISRO), for the Heads of Agency Plenary of the 70th International Astronautical Congress, Monday, Oct. 21, 2019 at the Walter E. Washington Convention Center in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jim Bridenstine listens as German Aerospace Center (DLR) executive board chair, Dr. Pascale Ehrenfreund, speaks about the robust relationship between their agencies in human and robotic exploration, and prospects for cooperation as NASA pursues the landing of humans on the Moon by 2024, at the Space Symposium, Wednesday, April 10, 2019 in Colorado Springs, Colorado. Photo Credit: (NASA/Aubrey Gemignani)

Walther Pelzer, German Aerospace Center (DLR) executive board member, speaks with NASA Administrator Jim Bridenstine about the robust relationship between their agencies in human and robotic exploration, and prospects for cooperation as NASA pursues the landing of humans on the Moon by 2024, at the Space Symposium, Wednesday, April 10, 2019 in Colorado Springs, Colorado. Photo Credit: (NASA/Aubrey Gemignani)