generate questions: In December 1966, the AS-205 mission was canceled, since the validation of the CSM would be accomplished on the 14-day first flight, and AS-205 would have been devoted to space experiments and contribute no new engineering knowledge about the spacecraft. Its Saturn IB was allocated to the dual mission, now redesignated AS-205/208 or AS-258, planned for August 1967. McDivitt, Scott and Schweickart were promoted to the prime AS-258 crew, and Schirra, Eisele and Cunningham were reassigned as the Apollo 1 backup crew.
What happened to the AS-205 mission originally? {sep_token} In what month and year was the AS-258 scheduled to launch? {sep_token} What was the dual mission AS-258 a combination of? {sep_token} Where were Schirra, Eisele and Cunningham relocated to after different astronauts were selected for the AS-258 mission? {sep_token}