David Leestma (born 1949) is a Dutch American astronaut and U.S. Navy aviator who flew on three Space Shuttle missions between 1984 and 1992, later serving in senior NASA leadership roles overseeing astronaut operations and flight crew activities.
Jack R. Lousma (born 1936) is a U.S. Marine Corps aviator and NASA astronaut who flew on Skylab-3 in 1973 and commanded Space Shuttle Columbia’s STS-3 mission in 1982, logging over 1,600 hours in space.
Shannon Lucid (born 1943) is an American astronaut and biochemist who flew on five NASA missions and spent 188 days aboard the Russian space station Mir in 1996, then a record for the longest spaceflight by a woman.
