Sean Clarke, NASA technical fellow for electric power for the NASA Engineering and Safety Center (NESC), based at NASA’s Armstrong Flight Research Center, participates in an employee incentive flying event with NASA Administrator Jared Isaacman's personal F-5 aircraft, Friday, March 27, 2026, at NASA’s Kennedy Space Center in Florida. Photo Credit: (NASA/John Kraus)

Engineers work on a wing with electric motors that is part of an integrated experimental testbed. From left are Sean Clarke, left, Kurt Papathakis at upper right and Anthony Cash in the foreground.

X-57 principal investigator Sean Clarke flies the X-57 simulator at NASA’s Armstrong Flight Research Center, examining ideal maneuvers and reaction times for flight.

Team members of the Leading Edge Asynchronous Propeller Technology Ground Test team include from left Brian Soukup, Sean Clarke, Douglas Howe, Dena Gruca, Kurt Papathakis, Jason Denman, Vincent Bayne and Freddie Graham.

Foreground, from left: Teresa Nieves-Chinchilla, director of the Moon to Mars Space Weather Analysis Office at NASA’s Goddard Space Flight Center; Kyle Back, director of the business management office at the Office of the Chief Financial Officer Enterprise at NASA Headquarters; NASA Administrator Jared Isaacman; and Luis Muniz, radiation safety officer at NASA’s Goddard Space Flight Center; background: Sean Clarke, NASA technical fellow for electric power for the NASA Engineering and Safety Center, based at NASA’s Armstrong Flight Research Center, center, and Ryan Fishel, pilot, right, pose for a photograph following an employee incentive flying event with Isaacman's personal F-5 aircraft, Friday, March 27, 2026, at NASA’s Kennedy Space Center in Florida. Photo Credit: (NASA/John Kraus)

X-57 Maxwell principal investigator, Sean Clarke, talks about the innovative contributions the X-57 research team made to the electric propulsion community during a knowledge sharing event at NASA’s Armstrong Flight Research Center in Edwards, California.

KENNEDY SPACE CENTER, FLA. - Martin Wilson, with United Space Alliance, describes an orbiter’s Thermal Protection System for members of the Stafford-Covey Return to Flight Task Group (SCTG). Handling some of the blanket insulation are Dr. Kathryn Clark and Joe Engle. Third from left is Richard Covey, former Space Shuttle commander, who is co-chair of the SCTG, along with Thomas P. Stafford, Apollo commander. Chartered by NASA Administrator Sean O’Keefe, the task group will perform an independent assessment of NASA’s implementation of the final recommendations by the Columbia Accident Investigation Board.

KENNEDY SPACE CENTER, FLA. - On a tour of the Tile Shop, members of the Stafford-Covey Return to Flight Task Group (SCTG) learn about PU-tiles, part of an orbiter’s Thermal Protection System. At left is Martin Wilson, with United Space Alliance. Others (left to right) around the table are James Adamson, Dr. Kathryn Clark, William Wegner, Richard Covey and Joe Engle. Covey, former Space Shuttle commander, is co-chair of the SCTG, along with Thomas P. Stafford, Apollo commander. Chartered by NASA Administrator Sean O’Keefe, the task group will perform an independent assessment of NASA’s implementation of the final recommendations by the Columbia Accident Investigation Board.

KENNEDY SPACE CENTER, FLA. - NASA worker Joy Huff (right) shows a leading edge subsystems (LESS) with tile bonded to it to members of the Stafford-Covey Return to Flight Task Group (SCTG). From left are Dr. Amy Donahue, David Lengyel, Dr. Kathryn Clark, Richard Covey, former Space Shuttle commander, and William Wegner. Covey is co-chair of the SCTG along with Thomas P. Stafford, Apollo commander. Chartered by NASA Administrator Sean O’Keefe, the task group will perform an independent assessment of NASA’s implementation of the final recommendations by the Columbia Accident Investigation Board.

KENNEDY SPACE CENTER, FLA. - On a tour of the Orbiter Processing Facility, members of the Stafford-Covey Return to Flight Task Group (RTFTG) look at a Reinforced Carbon-Carbon panels with a T-seal held by Tom Roberts, with United Space Alliance. From left are Richard O. Covey, former Space Shuttle commander, Dr. Kathryn Clark, James Adamson, Joe Engle, William Wegner and Dr. Amy Donahue. Chairing the task group are Covey and Thomas P. Stafford, Apollo commander. Chartered by NASA Administrator Sean O’Keefe, the task group will perform an independent assessment of NASA’s implementation of the final recommendations by the Columbia Accident Investigation Board.

KENNEDY SPACE CENTER, FLA. - The Return To Flight Task Group (RTFTG) holds the first public meeting at the Debus Center, KSC Visitor Complex. Members and staff at the table, from left, are retired Navy Rear Adm. Walter H. Cantrell, David Raspet, retired Air Force Col. Gary S. Geyer, Dr. Kathryn Clark, Dr. Decatur B. Rogers, Dr. Dan L. Crippen, Dr. Walter Broadnax and astronaut Carlos Noriega. The RTFTG was at KSC to conduct organizational activities, tour Space Shuttle facilities and receive briefings on Shuttle-related topics. The task group was chartered by NASA Administrator Sean O’Keefe to perform an independent assessment of NASA’s implementation of the final recommendations of the Columbia Accident Investigation Board. The group is co-chaired by former Shuttle commander Richard O. Covey and retired Air Force Lt. Gen. Thomas P. Stafford, who was an Apollo commander.

NASA employees participate in an employee incentive flying event using NASA Administrator Jared Isaacman's personal F-5 aircraft, Friday, March 27, 2026, at NASA’s Kennedy Space Center in Florida. Photo Credit: (NASA/John Kraus)