NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

Audience members listen as NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gives keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine tours the NASA exhibit at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine tours the NASA exhibit at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine tours the NASA exhibit at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine tours the NASA exhibit at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine tours the NASA exhibit at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine tours the NASA exhibit at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

NASA Deputy Administrator Jim Morhard tours the NASA exhibit at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine tours the NASA exhibit at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine tours the NASA exhibit at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Stafford, former NASA astronaut, Air Force officer and test pilot, right, shakes hands with NASA Administrator Jim Bridenstine at an event where General Stafford was awarded the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

The audience stands and applauds for General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot after he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

The General James E. Hill Lifetime Achievement Award is seen as General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot accepts the award at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine listens as General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

Former NASA Administrator Mike Griffin introduces General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot is seen in the audience at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General William Shelton awards General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General William Shelton awards General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, center, and Al Worden, Apollo astronaut, right, listen to a speaker just prior to Administrator Bridenstine taking the stage to give keynote remarks at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Representatives from the space industry, military, and news media were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks to former astronaut Al Worden in the audience at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

Former NASA Administrator Mike Griffin congratulates General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

Former NASA Administrator Mike Griffin introduces General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

Former NASA Administrator Mike Griffin introduces General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

General Thomas Patten Stafford, former NASA astronaut, Air Force officer and test pilot speaks at an event where he received the General James E. Hill Lifetime Achievement Award, at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Former and current NASA Administrators were in attendance. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine speaks with media at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine speaks with media at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine speaks with media at the Space Symposium, Tuesday, April 9, 2019, at Broadmoor Hall in Colorado Springs, Colorado. Photo credit: (NASA/Aubrey Gemignani)