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.
Sybold van Ravesteyn Sybold van Ravesteyn (born Sijbold van Ravesteijn, 18 February 1889, Rotterdam — 23 November 1983, Laren) was a Dutch architect. He designed many train stations, many now demolished, a zoo, public buildings such as theatres, as well as residences, interiors and furniture.