more likely the NRA will want to put bombs at every marathon, given their recent history of wanting to deal with children being slaughtered by increasing gun sales without background checks, and the special "In Your Face" 100 round clip specials. If more guns is the answer, then i can imagine more bombs can't be far behind.
Oh, and in case you are wondering, one of your wingnut boys, Tagg Romney, inexplicably just issued a press release saying he is okay. (from CNN) Huh?