Color me skeptical, but I do not believe that Kerry shot the bird. There had to be so many cameras to catch the act....yet no one did?? I would have to have an independent eyewitness tell me so.
Remember, It's hard to believe that a decorated Viet Nam war veteran would come back to accuse and pillory his "brothers". It's also rather hard to believe that a sitting senator would go on public radio and drop the f-bomb when discussing the POTUS. So I'm not unconvinced that ef'n would stoop so low as to "finger" one of his "brothers" who he considers to be a political enemy.
I haven't seen the pics of him laying on the slope after his fall on skis or a bicycle post crash photo. He was surrounded by people with cameras during those episodes, too.