It's April 13, 1969 and, if you folks have been following Space Talk Sunday since the beginning, you know what it's time to talk about: Project Gemini. Gemini was NASA second human spaceflight program and bridged the Mercury and Apollo projects. It started in 1965 and had three main objectives: Collect physiological data about the impact of longer spaceflights on astronauts; Conduct spacewalks to determine how astronauts could function outside a spacecraft; and dock one spacecraft to another.