Question: Which booster was used to send the 1st American into orbit?
Sentence (from "Orion abort modes"): NASA's newest spacecraft, the Orion Multi-Purpose Crew Vehicle (MPCV), will be the first American spacecraft since Project Apollo to use an escape system in the event of a launch abort, something its predecessor, the Space Shuttle, had for only its first four orbital test flights in 1981-1982.
Relevant evidence: No