“November 1961, near Edwards Air Force Base, California, USA —- A B-52 carries an X-15 rocket plane under its wing, to launching altitude for a test flight over Edwards Air Force Base in California. A chase plane follows and observes the planes. The X-15 rocket plane, built by North American Aviation, was used in a joint project by the United States Air Force and NASA to do preparatory research for manned space flight in the early 1960s. —- Image by © Dean Conger/CORBIS”
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