After finishing their work, Armstrong and Aldrin returned to the "Eagle" and slept for seven hours before starting to leave. While preparing to leave, Aldrin broke the circuit breaker in the engine starter. Armstrong used a pen to bridge the circuit and stop them from being stuck on the moon. Aldrin and Armstrong left many things on the moon: an American flag, a few experiments, a golden feather, a logo of Apollo 1 and some bronze coins honoring Yuri Gagarin and Vladimir Komarov. He also left a sign on the moon, with a message from the human race. The sign reads: