July 17, 1966: Astronauts prepare for afternoon launch

PILOT MICHAEL COLLINS, practicing in weightless conditions, is entwined in his umbilical cord as he rehearses his scheduled walk in space during preparations for the three-day Gemini 10 flight, which would set a world altitude record of 474 miles. Command pilot John Young watches from the hatch of a spacecraft replica during the weightless session aboard a KC135 plane at the Kennedy Space Center in Florida.