During the height of the Vietnam War, Da Nang Air Base was one of the busiest airports in the world, if not the busiest. As if the stress of being an air traffic controller wasn't enough, U.S. Air Force Air Traffic Controllers in Vietnam had to deal with the same levels of traffic found in places like Chicago O'Hare International Airport while under fire. Amazingly, these no doubt stressed-out airmen were able to do their jobs flawlessly, often living in wartime conditions in the middle of...