With the introduction of Russian SAM missles (surface to air missles) in the middle 1960;s, the US started to lose an excessive amount of aircraft and crews during bombing raids over North Vietnam.In 1969 the CIA developed a radar system that could alert the aircraft crew when A SAM was locked on their plane. Located in a perfect location high in the mountains of Laos and close to the North Vietnam border. When it was operational, the site would lock in on the missle fired and would alert the targeted aircraft. They would then have enough time to take evasive action. Aircraft losses were cut by 75 percent when the site was operational. All of a sudden the site is attacked and overrun by a Division of North Vietnamese. On one of the bodies was a map showung the exact location mof the radar site. Only 4 people knew the exact location. The president, the Secretary of State the Ambassador to South Vietnam and Burt Courage. Some one betrayed the US and gave the location to our enemies. It had to be one of the four Americans.