The Space Shuttle Endeavour receives a high-flying salute from its sister Shuttle Columbia, atop NASA's Shuttle Carrier Aircraft, shortly after its landing Oct. 12, 1994 at Edwards, California, to complete mission STS-68. Columbia was being ferried from the Kennedy Space Center, Florida to Air Force Plant 42, Palmdale, California, where it will undergo six months of inspections, modifications, and systems upgrades. The STS-68 11-day mission was devoted to radar imaging of Earth's geological features with the Space Radar Laboratory. The orbiter is surrounded by equipment and personnel that make up the ground support convoy that services the space vehicles as soon as they land.