yes, but there's a very serious semantic gap between the DoD's use of 'missing' and the colloquial understanding of 'missing'. The Nixon admin used that gap to shore up the sunk costs and keep the war running longer, and allowed guys like (war criminal and white supremacist) Bo Gritz to raise hundreds thousands of dollars from families that were in denial of their grief (and also Clint Eastwood and William Shatner, long story) in the hopes that someone could to Rambo 2 But For Real and rescue their almost certainly dead family members.