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.
Frans Hemerijckx Frans Hemerijckx (1902-1969) was a Flemish leprologist, humanist and the founder of the Damien Foundation in Belgium, a non profit non governmental organization engaged in providing treatment and rehabilitation services to people afflicted with leprosy. He spent most of his life in the treatment and rehabilitation of leprosy patients and initiated a mobile leprosy treatment methodology, "Clinic under the trees". On 13 September 1975, Government of Belgium honoured Hemerijckx by issuing a commemorative stamp, depicting his image. (9615) Hemerijckx, a Main-belt comet discovered in 1993 by Eric Walter Elst is named after the Flemish doctor.