Vertical cropped royalty-free stock photo of Mission Specialist Bruce McCandless II equipped with the Manned Manuevering Unit (MMU) nitrogen jet propelled backpack, "free-flying" 320 feet away from the Orbiter in outer space, Earth and blackness of the unknown in the background. The MMU is controled by joy sticks on the arm rests. Moving the joy sticks left or right or by pulling them fires nitrogen jet thrusters propelling the astronaut in the desired direction. Photo Credit: NASA [0003-0709-0616-0245] by 0003
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