General Lester L. Lyles, USAF (Ret.) NASA Advisory Council member, listens during a meeting of the council at the Rayburn House Office Building, Tuesday, Nov. 29, 2005, in Washington. Photo Credit: (NASA/Bill Ingalls)

Gen. Lester Lyles, USAF (retired) chairs the NASA Advisory Council (NAC) during an executive session, Monday, Feb. 28, 2022, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Bill Ingalls)

Gen. Lester Lyles, USAF (retired), left, and NASA Administrator Bill Nelson, right, give welcome remarks during an executive session of the NASA Advisory Council (NAC), Monday, Feb. 28, 2022, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Michael Griffin, left, talks with NASA Advisory Council members Gen. Lester L. Lyles, USAF (Ret.), center, and NASA Advisory Council chairman, former Senator and Apollo astronaut Harrison H. "Jack" Schmitt at the Rayburn House Office Building, Tuesday, Nov. 29, 2005, in Washington. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Bill Nelson, left, and chair of the NASA Advisory Council (NAC) Gen. Lester Lyles, USAF (retired), talk with other NAC members, attending virtually, during an executive session of the NASA Advisory Council (NAC), Monday, Feb. 28, 2022, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Bill Nelson, left, and chair of the NASA Advisory Council (NAC) Gen. Lester Lyles, USAF (retired), talk with other NAC members, attending virtually, during an executive session of the NASA Advisory Council (NAC), Monday, Feb. 28, 2022, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Bill Ingalls)

Norman Augustine, chair of the Human Space Flight Review Committee, front center, is joined by other members of the committee, clockwise from left, Bohdan Bejmuk, Leroy Chiao, Dr. Wanda Austin, Philip McAlister, Dr. Edward Crawley, Jeffrey Greason and Dr. Christopher Chyba prior to the start of the first of several public meetings at different U.S. locations, Wednesday, June 17, 2009, at the Carnegie Institution in Washington. The panel will examine ongoing and planned NASA development activities and potential alternatives in order to present options for advancing a safe, innovative, affordable and sustainable human space flight program following the space shuttle's retirement. The committee wil present its results by August 2009. Members of the committee that were not in attendance and are not pictured are Dr. Charles Kennel, Retired Air Force Gen. Lester Lyles and former astronaut Sally Ride. Photo Credit: (NASA/Paul E. Alers)

CAPE CANAVERAL, Fla. – NASA Kennedy Space Center's Center Director Bob Cabana (right) speaks during the meeting of the Augustine Commission in Cocoa Beach, Fla. At the conference table at left are members of the commission: Dr. Edward F. Crawley, Ford professor of engineering at MIT; General (ret.) Lester L. Lyles, chair of the National Academies Committee on the Rationale and Goals of the U.S. Civil Space Program; and former astronaut Dr. Leroy Chiao, former International Space Station commander and engineering consultant. At the request of the Office of Science and Technology Policy, NASA established the Review of U.S. Human Space Flight Plans Committee, known as the Augustine Commission. Chaired by Norman R. Augustine, retired chairman and CEO of Lockheed Martin Corp., the committee is conducting an independent review of ongoing U.S. human spaceflight plans and programs, as well as alternatives, to ensure the nation is pursuing the best trajectory for the future of human space flight - one that is safe, innovative, affordable, and sustainable. Photo credit: NASA/Jim Grossmann