Acting on James Bevel's call for a march from Selma to Montgomery, King, Bevel, and the SCLC, in partial collaboration with SNCC, attempted to organize the march to the state's capital. The first attempt to march on March 7, 1965, was aborted because of mob and police violence against the demonstrators. This day has become known as Bloody Sunday and was a major turning point in the effort to gain public support for the civil rights movement.
The group's third US tour opened with a performance before a world-record crowd of 55,600 at New York's Shea Stadium on 15 August 1965 – "perhaps the most famous of all Beatles' concerts", in Lewisohn's description
The crew assignments for Gemini 8 were announced on September 20, 1965. Under the normal rotation system, the backup crew for one mission became the prime crew for the third mission after, but Slayton designated David Scott as the pilot of Gemini 8. Scott was the first member of the third group of astronauts, whose selection was announced on October 18, 1963, to receive a prime crew assignment.