Members of a U.S. military honor guard pass flag-draped caskets in the interior of an Air Force C-17 cargo jet Tuesday. The caskets contain the remains of what are believed to be seven Americans killed during the Vietnam War. U.S. Ambassador Pete Peterson, a former prisoner of war himself, called the occasion "bittersweet. . . It harks back to a time of warfare but at the same time allows families to rest after 30 years." Overall, 2,081 Americans are still listed as missing in action in Indochina, including 1,554 in Vietnam. More than 300,000 Vietnamese are also listed as MIA.