 John Houbolt

John Cornelius Houbolt (April 10, 1919 – April 15, 2014) was an aerospace engineer credited with leading the team behind the lunar orbit rendezvous (LOR) mission mode, a concept that was used to successfully land humans on the Moon and return them to Earth.This flight path was first endorsed by Wernher von Braun in June 1961 and was chosen for Apollo program in early 1962.