He developed procedures allowing astronauts to monitor the Apollo Command Module Onboard Guidance and Navigation Computer during atmospheric reentry, and to control the reentry manually should they need to override the computer.
Its major successes were launching the Pegasus satellites and flight verification of the Apollo Command and Service Module aerodynamics in the launch phase.
The main payload of the Saturn I was the boilerplate version of the Apollo Command and Service Modules and Launch Escape System.
North American Aviation was responsible for a number of historic aircraft like the P-51 Mustang, F-86 Sabre Jet, the Apollo Command and Service Module as well as the B-25.
Both are based substantially on the Apollo Command and Service Modules (Apollo CSM) flown between 1967 and 1975, but include advances derived from the space shuttle program.
From 1969 to 1972, Cohen was the manager for the Apollo Command and Service Modules.
Photos of the solar corona that included the planet Mercury and some background stars were taken from lunar orbit by Apollo 15 Command Module Pilot Al Worden.
In January 1969, the Apollo 7 Command Module was displayed on a NASA float in the inauguration parade of President Richard M. Nixon.
The Apollo 9 Command module was nicknamed "Gumdrop" - not only did it have the appropriate stumpy cone shape, but it arrived at Cape Kennedy in a blue cellophane wrapper.
The Apollo 12 Command Module Yankee Clipper is on display at the Virginia Air and Space Center in Hampton, Virginia.