Gemini 6 spacecraft (right) and Agena Target Vehicle (left) on the Boresight Range Tower for at the Kennedy Space Center to test the two spacecrafts? docking capability. Agena was designed to launch separately from Gemini and act as a target for astronauts in a Gemini spacecraft to rendezvous with. Gemini 6 was slated to be the first mission to dock with Agena, but a malfunction with the unmanned target resulted in new objectives for Gemini 6 calling for a one day rendezvous with Gemini 7 in December, 1965.
