The National Aeronautics and Space Administration is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research. NASA have many launch facilities but most are inactive. The most commonly used pad will be LC-39B at Kennedy Space Center in Florida.
Gemini 4 was the second crewed mission of the NASA's Project Gemini. The mission was commanded by Command Pilot James A. McDivitt and Pilot Edward H. White II. On the mission, White became the first American to perform a spacewalk. The mission began on June 3, 1965, 15:15:59 UTC and ended on June 7, 1965, 17:12:11 UTC.