Crewed Spaceflight — 2 museum-grade prints from the period. John Glenn became the first American to orbit Earth on Mercury-Atlas 6, completing three revolutions on 20 February 1962. The mission confirmed capsule attitude control, reentry procedures, and recovery operations for the Mercury program that bridged suborbital hops to Gemini rendezvous. Gemini IV set the longest US spaceflight duration to date at four days and delivered the first American extravehicular activity on 3 June 1965. Edward White's spacewalk with a handheld maneuvering gun became one of the defining images of Project Gemini — the two-man program that proved rendezvous, docking, and EVA techniques Apollo required for lunar landing.