we went to boston to meet dan futrell and isaac stoner, who guys who one day searching the internet founds wick piedia page, a page revealing that just 19 aircraft black boxes worldwide are unaccounted for, including one on bolivia's 21,000-foot mount illimani. never recovered, it said, because of inaccessible terrain. >> so you find this by googling and decide what? we can go find this black box that nobody's found for decades? >> well, dan had to talk me into it, which took a little while. like come on, people have been to the moon, people have been to the top of everest, what does inaccessible mean? and with a couple of google maps and a few videos we thought we can do it. >> trying to reach that eastern airlines jet which crashed into the side of a mountain outside la paz. >> a boeing 727 with 29 on board including eight americans slammed into mt. illimani new year's day 1985. >> the full-scale investigation by inspectors from the national transportation safety board is now under way. >> reporter: but the crash site, so remote and at 19,000 feet above sea level so high that those inve