JOINT BASE SAN ANTONIO-LACKLAND, Texas, May 2 -- The U.S. Air Force Joint Base San Antonio-Lackland (16th Air Force) issued the following news: It was April 28, 1975, and Saigon was about to fall to North Vietnamese forces, ending the Vietnam War. Tam Do Nguyen, a South Vietnamese naval officer, was fighting alongside the U.S. Navy 7th Fleet for three years when life as he knew it ceased to exist. With troops starting to lose hope at the impending fall of South Vietnam, the U.S. Navy offered  more PR