Who flew on a 1985 Space Shuttle "Challenger" mission as a Payload Specialist, Claude Nicollier or  Lodewijk van den Berg?
Lodewijk van den Berg Lodewijk van den Berg (] ; born March 24, 1932) is a Dutch American chemical engineer, specializing in crystal growth, who flew on a 1985 Space Shuttle "Challenger" mission as a Payload Specialist.
STS-51-F STS-51-F (also known as Spacelab 2) was the nineteenth flight of NASA's Space Shuttle program and the eighth flight of Space Shuttle "Challenger". It launched from Kennedy Space Center, Florida, on July 29, 1985, and landed just under eight days later on August 6.