the chance of finding art schumacher and the others on the first dig may be small, but schumacher's niecerom washington. what would it mean to find your uncle? >> jo: well, gosh, we could bring him home. we could bring him home to family. and we can do a proper burial, we can honor them. and they gave their lives for the country. >> cooper: scannon's team has found debris from at least 30 american planes over the past 20 years. in addition to the eight airmen recovered from 453, bent prop's other discoveries could lead to the return of 19 more m.i.a.s from palau. but many planes crashed in far less accessible parts of the ocean and dense jungle, and their crews never found. do you know how many americans are still missing here? >> scannon: we think it's somewhere between 70, 80 american... american airmen crashed in this area. the real question is how many crashed inside the barrier reef. inside the barrier reef means we can possibly find them. >> cooper: why? because outside...? >> scannon: it's 2,000 feet deep. >> cooper: in 2005, scannon's team found this wing of a t.b.m. avenger in th