Do it scared.⁣ ⁣ Astronaut Bruce McCandless II flew the Manned Maneuvering Unit (MMU) out of the space shuttle Challenger’s payload bay for the first time on Feb. 7, 1984, a time where many were fearful about the use of a self-propelled and untethered backpack in space.⁣ ⁣ The MMU jetpack allowed crews to move outside of the cargo bay and perform activities away from the safety of the spacecraft. The award-winning manned maneuvering unit was designed for a specific type of mission: satellite rescue missions. McCandless would be the first to test the MMU technology. He first flew 150 feet (45 meters) away and returned, then ventured out to 320 feet (97 m) away from the shuttle. This is an orbital spacewalk record that still stands today.⁣ ⁣ McCandless remembered trying to ease the tension for his wife and the flight controllers in Mission Control, saying something similar to Neil Armstrong’s declaration as he first stepped on the Moon in 1969. “It may have been one small step for Nei...