 Brother of Wyatt Earp, Virgil eventually ended up in Prescott, Arizona, where he was elected constable in 1878. And by the end of 1879, Virgil was in Tombstone, Arizona, where he and his brothers became legends following the actions at the O.K. Corral. And this day in 1966 saw the launch of Gemini 10, featuring astronauts John Young and Michael Collins with a target spacecraft. Young would conduct two spacewalks as well.