i wanted a clean cut. i came through the front door on the first day, and i wanted to leave through the front door. i don't feel like the navy owes me anything. i don't feel like i owe the navy anything. my only regret is that i miss my guys. >> are you worried about your personal security? >> yes. >> why specifically? >> well, i don't know how people will react to this. i think all the guys, especially on the mission, but -- all the guys on the mission, there could be a threat, yes. >> one year after "operation neptune spear," another navy seal published a book detailing his account of the raid, using the pen name "mark owen." >> we have essentially two different versions of what happened. >> "no easy day" claims that the point man's first shot up the stairs hit bin laden, knocking him to the floor. >> the version told by mark owen, he places himself as second in the line up the