1st American Spacewalker. On June1965 the first American stepped outside his spacecraft and let go. For 23 minutes he floated and manoeuvred himself around the Gemini spacecraft while logging 6500 miles during his orbital stroll remaining throughout attached the spacecraft by a 25 foot umbilical line and a 23-ft. tether line, both wrapped in gold tape form one cord (NASA Media Archives). Buy this as a superb wall poster, a canvas print or a framed print.