I saw a video of this on Fox News this morning. Fox reported the agent as Nick Trotta. I've seen him in many photos and videos with the President. Thank God we have a leader with a set of balls. Kerry would have left the guy there and gone inside doing his Confucius bow.
Nick Trotta Story. Although his picture in this story doesn't look like the one cited in the story today.
http://www.salesianhigh.org/alumni/news.html