Capt. Ernest W. Spradley of Aerial Photo Lab and Capt. James E. Cocker of All-Weather Flying Division both AMC, Wright-Patterson AFB, Ohio, a General Mills Aeronautical lab project engineer Mr. McAleese and an airman, were flying in a C-47 heading ESE at about 10,000' to 12,000' and tracking a Project GOPHER plastic balloon at about 50,000' to 70,000' when they saw a bright star like object seemingly next to the pear shaped balloon or above and to the side.
As they approached and flew under the balloon they noticed the object descend to the balloon’s level and grow larger in apparent size until about ¼ to ½ the 70' balloon, when it appeared to be round and flat like a dime, milky white or silvery in color with a clear outline.
Cocker & McAleese left the cockpit went to the astrodome to observe the object.
After 3 minutes they saw the object separate from the balloon and head W at high speed, after about 1 minute it emitted a series of 3 bright flashes like photo flashes at 1 second intervals and disappeared from sight.