The black-and-white snapshot, its images shadowy and washed out, shows three men holding a cryptic, hand-lettered sign. Family members of three U.S. officers missing in action in the Vietnam War -- Colonel John Robertson, Major Albro Lundy Jr. and Lieut. Larry Stevens -- say they are "positive" those are the men in the photograph.
Pentagon analysts have been studying the picture since receiving it from "an intelligence source" 10 months ago but say they are still unable to authenticate it because the print is so poor. The FBI is trying to determine whether the picture was faked.
Most senior officials in...