Apollo 7 launches as first crewed flight, testing Command and Service Module in Earth orbit

Following the catastrophic Apollo 1 flash fire in January 1967, which claimed the lives of astronauts Gus Grissom, Ed White, and Roger Chaffee, NASA spent 21 demanding months redesigning the Apollo Command and Service Module (CSM). Flammable materials were systematically purged, wire insulation was replaced, pure oxygen ground atmospheres were eliminated, and a quick-opening unified hatch was installed. Apollo 7 was designated as the critical first crewed flight test of Block II CSM spacecraft CSM-101, designed to evaluate every major subsystem in low Earth orbit before deep-space hardware could be qualified for lunar trajectories.

On October 11, 1968, at 11:02 a.m. EDT, Apollo 7 lifted off from Launch Complex 34 at Cape Kennedy aboard a Saturn IB rocket (SA-205). The crew comprised veteran Mercury and Gemini astronaut Walter "Wally" Schirra Jr. as commander, Donn F. Eisele as command module pilot, and R. Walter Cunningham as lunar module pilot. Once in orbit, the astronauts executed a rendezvous exercise with the spent Saturn IB S-IVB second stage, simulating maneuvers that future missions would use to retrieve the Lunar Module. Over the course of nearly 11 days, the crew performed eight flawless firings of the Service Propulsion System (SPS) engine, a hypergolic engine with no backup that was essential for inserting Apollo into lunar orbit and bringing astronauts home.

The flight was an extraordinary technical victory, proving the reliability of the modified CSM, environmental control systems, and power systems. However, the mission was marked by intense interpersonal friction between the crew and Mission Control in Houston. All three astronauts contracted severe head colds in microgravity, making mucus drainage impossible. Schirra became notoriously irritable, objecting to last-minute flight plan additions, refusing to wear helmets during reentry to prevent eardrum rupture, and openly arguing with flight directors Chris Kraft and Gene Kranz.

Despite the tension, Apollo 7 achieved 101% of its planned technical objectives. The spacecraft splashed down safely in the Atlantic Ocean north of Bermuda on October 22, 1968. The flawless performance of CSM-101 restored public and managerial confidence in NASA's engineering, clearing the way for the audacious decision to send Apollo 8 to the Moon two months later.