pilot told cbs news correspondent david martin about witnessing a 21-year-old marine stave off a taliban ambush that threatened to overrun his unit. the marine was dakota meyerucky farm boy who received the nation's highest military award, the medal of honor, from president obama at the white house. meyer was on a mission in the ganjgal valley of afghanistan, where he repeatedly ran a gauntlet of enemy fire in a desperate effort to save his fellow marines. dakota meyer will tell you that story tonight, but there is much more to it than his almost insane bravery. this was an operation which went terribly wrong, so wrong that two army officers were issued career-ending letters of reprimand. it's a story as old as combat. when a warrior's leaders let him down, he has nothing to fall back on but his own courage. dakota meyer will tell you he was just doing his job, but when you see and hear what he did, you too may say, "i've never seen the like." >> martin: dakota meyer grew up shooting game on this farm in greensburg, kentucky, and can hit a squirrel at 750 yards. but it wasn't his marksmanship that earned him the medal of honor; it was his astonishing courage