i moderated a town hall for the more than 4,000 midshipmen at the u.s. naval academy in annapolis, a sea of white where i got to speak with three of the nation's 72 living recipients of the medal of honor. woody williams, the only living marine from world war ii to receive the medal of honor. at the battle of iwo jima, he cleared the way for the infantry. effective weapon we had against the boxes because they were reinforced concrete. chris: kyle carpenter who shielded a fellow marine in afghanistan. >> i essentially came to terms it, and and i was bleeding out, and this was the last few seconds i would have.