U.S. Sen. John H. Glenn, Jr., gives the thumbs up from the cockpit of a training aircraft as he prepares for his return to space on the shuttle Discovery's STS-95 mission in 1998.
U.S. Sen. John H. Glenn, Jr., gives the thumbs up from the cockpit of a training aircraft as he prepares for his return to space on the shuttle Discovery’s STS-95 mission in 1998.
Credit: NASA
