Bangor has been the port of entry for over a million servicemen and women returning from the Gulf War, the Iraq and Afghanistan wars, and the NATO operations IFOR and SFOR in Bosnia and Herzegovina on military charters. Starting in 1991, a combination of local veterans and interested citizens formed themselves into troop greeters to avoid the situation of the Vietnam War, when soldiers returned without ceremony or greeting. The civilian-driven "ceremony of return" in Bangor has been well organized and often ebullient. In 2006, former president Bill Clinton spontaneously joined the line of troop-greeters when his private plane made a refueling stop.