AEDC support to Apollo program
A shadowgram taken during a free-flight reentry test shows the shockwave generated as a scale model of the Apollo capsule travels in the normal reentry flight position. These scale models were launched at speeds of 4,300 to 6,600 miles per hour at simulated altitudes of more than 100,000 feet. The tests were carried out at Hypervelocity Ballistic Range G at Arnold Air Force Base in 1967, and the tests were done to substantiate reentry data. (U.S. Air Force photo)