 The head of the Lockheed team was Cleon Lacefield.The Lockheed Martin CEV design included several modules in the LEO (low earth orbit) and crewed lunar versions of the spacecraft, plus an abort system.The abort system was an escape tower like that used in the Mercury, Apollo, Soyuz, and Shenzhou craft (Gemini, along with the Space Shuttles "Enterprise" and "Columbia" [until STS-4] used ejection seats).