Since he is in front by the railing he may well have been there prior to Demoscum arrival.
There are bound to be more still photos and maybe even video of the actual attack if the News Cartel drones haven't had their editors "edit" them yet.
Their may be airport security camera footage and I will wager that the local or campaign security folks filmed it.
Will the ACLU step in and proclaim their support of the oppostition's free speech rights?
Don't the other signs say, 'A stronger America begins at home'??? No wonder the Kerry people were pissed.