Ulf Merbold and Lodewijk van den Berg, both flew in ?
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.
Gabor Varga Gabor Varga (March 15, 1961 - September 10, 2006) was a Swedish aviator who was in the Guinness Book of Records for having performed 256 aerobatic loops in an hour.