Once we were alone, the intelligence officer shut the door, went over to his safe, and dug out a big, thick report. It was the standard Air Force reporting form that is used for all intelligence reports, including UFO reports. The intelligence officer told me that this was the only existing copy. He said that he had been told to destroy all copies, but had saved one for me to read. With great curiosity, I took the report and started to read. What _had_ happened at this fighter base? About ten o'clock in the morning, one day a few weeks before, a radar near the base had picked up an unidentified target. It was an odd target in that it came in very fast--about 700 miles per hour-- and then slowed down to about 100 miles per hour. The radar showed that it was located northeast of the airfield, over a sparsely settled area. Unfortunately the radar station didn't have any height-finding equipment. The operators knew the direction of the target and its distance from the station but they didn't know its altitude. They reported the target, and two F-86's were scrambled. The radar picked up the F-86's soon after they were airborne, and had begun to direct them into the target when the target started to fade on the radarscope. At the time several of the operators thought that this fade was caused by the target's losing altitude rapidly and getting below the radar's beam. Some of the other operators thought that it was a high-flying target and that it was fading just because it was so high. In the debate which followed, the proponents of the high-flying theory won out, and the F-86's were told to go up to 40,000 feet. But before the aircraft could get to that altitude, the target had been completely lost on the radarscope. The F-86's continued to search the area at 40,000 feet, but could see nothing. After a few minutes the aircraft ground controller called the F-86's and told one to come down to 20,000 feet, the other to 5,000 feet, and continue the search. The two jets made a quick letdown, with one pilot stopping at 20,000 feet and the other heading for the deck. The second pilot, who was going down to 5,000 feet, was just beginning to pull out when he noticed a flash below and ahead of him. He flattened out his dive a little and headed toward the spot where he had seen the light. As he closed on the spot he suddenly noticed what he first thought was a weather balloon. A few seconds later he realized that it couldn't be a balloon because it was staying ahead of him. Quite an achievement for a balloon, since he had built up a lot of speed in his dive and now was flying almost straight and level at 3,000 feet and was traveling "at the Mach."