Former U.N. Ambassador John R. Bolton speaks during the leadership forum at the National Rifle Association's annual convention on Friday, May 3, 2013, in Houston. (AP Photo/Steve Ueckert)

Photo by: Steve Ueckert

Former U.N. Ambassador John R. Bolton speaks during the leadership forum at the National Rifle Association's annual convention on Friday, May 3, 2013, in Houston. (AP Photo/Steve Ueckert)