President Lyndon B. Johnson announces the existence of the Lockheed A-11, with a cruising speed of more than Mach 3 at altitudes above 70,000 feet. (Use of the designation A-11 to refer to the Air Force’s YF-12A was deliberate to cloud the existence of the CIA’s A-12, a single-seat reconnaissance aircraft that had been flying in secret and was the actual basis for the two-seat YF-12.) Only three YF-12A interceptors are built, and the SR-71 program for the Air Force takes precedence.
Assistant Secretary of Defense for Space Policy John F. Plumb warned lawmakers that Russia is developing an “indiscriminate” nuclear weapon to go in space, confirming reports from several months ago and describing potentially devastating effects in orbit.