Gemini 4
Gemini 4 launches and Ed White makes the first American spacewalk
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Original prompt & settings (JSON) ↗White's hand-held oxygen gun ran dry while he was still outside, so he kept moving by pulling and pushing on a 25-foot tether.
10:15:59 a.m. from Complex 19
Gemini 4 lifted off from Complex 19 at Cape Kennedy at 10:15:59 a.m. EST on 3 June 1965, carrying command pilot James McDivitt and pilot Edward H. White II.
After insertion into orbit, McDivitt tried to station-keep with the spent Titan II second stage — a passive object carrying two running lights and no rendezvous radar. NASA ended the exercise after it consumed 42 percent of the spacecraft's maneuvering propellant, to protect the remaining objectives.
Twenty-odd minutes outside
White left the capsule as it passed over the Hawaii tracking station, becoming the first American to perform an extravehicular activity. An oxygen-fed hand-held maneuvering unit let him move around, while a 25-foot tether and umbilical kept him attached and supplied his oxygen and communications.
He was outside roughly 20 to 22 minutes, depending on which NASA timing convention is used. After he returned, the crew had trouble closing and latching the hatch, worked it shut, and the mission continued.
Houston's first flight, Europe's first live launch
Gemini 4 was the first human spaceflight controlled from the new Mission Control Center in Houston.
The launch was carried live to 12 European countries through the Early Bird communications satellite — the first international live television audience for a crewed launch. The flight ran 97 hours 56 minutes 12 seconds over 62 revolutions; the four-day endurance test, not the EVA, was the mission's principal objective.
Sources
Researched 23 Aug 2026 6 sources 2 audit passes
How this was checked
Researched from the web into a fact sheet, rewritten from that sheet, then audited against it by a different model. How the pipeline works →
What the sources leave uncertain
- NASA sources use slightly different EVA timing conventions. The Gemini chronology calls White's time outside 20 minutes, while the formal mission report says approximately 22 minutes. Neither supports an exact 23-minute duration.
- NASA's formal chronology says the stationkeeping exercise was terminated before a rendezvous was attempted, while later popular NASA accounts describe the activity as an attempted rendezvous. It is safest to call it an unsuccessful stationkeeping or preliminary rendezvous exercise.