July 18, 1966 Gemini 10
Gemini 10 was piloted by astronauts John W. Young and Michael Collins. The flight was launched on July 18, 1966. After five hours and 21 minutes of flight, Gemini 10 made a successful rendezvous with an Agena rocket. After the rendezvous, the Agena powered the joint rockets to a new record height of 458 miles. After conducting scientific experiments, the two craft separated, the Gemini 10 rendezvoused with another Agena, and astronaut Collins made a space walk to retrieve a scientific package on the Agena. The mission lasted for three days.