and the next day, o'hara tried to give meaning to hall's death. >> o'hara: just understand we're doingwe're doing good work, we're making a difference here, we're here fighting for the people of afghanistan, we're here ultimately fighting for our country. should we have been in afghanistan? i don't know. maybe the answer's yes, maybe it's no. and so, when i run into people who say, "tell me about afghanistan. what were our goals there? should we have been there?" i think i'm in the same boat where i would say, "you know, to be honest with you, i don't know." >> pelley: after two tours and a lot of questions, o'hara's been recruited into general electric's program for returning vets. he's a project manager for g.e. oil and gas. and sometimes, he thinks about running for office. >> o'hara: i had done what i wanted to do in the marine corps. i could say i deployed twice in the defense of my nation, so that was something i was proud of. there's certainly part of you that says, "i'm glad that that's over with." >> pelley: goodbye to all that. >> o'hara: yeah. goodbye to afghanistan. i won't