with all those people, looking around, with everything that was going on, they could have had a pound or 2 of c-4 or something similar - how big a bag could that have fit in. if you had a fast food bag - mcdonald or burger king, etc. put a couple of hamburger boxes or something else in there, who's going to pay attention to a bag like that being put in a garbage can. when was the last tiem you went to a event this size - baseball, football or hockey game, how much do you pay attention to somebody throw away a fast food bag. they arent going to put a bag or box in a place like that that is going to say " CAUTION, HIGH EXPLOSIVES, STAY AWAY, MAY CAUSE INJURY" in bright green, orange or red leters to call attention to it or be in a suitcase or breifcase, something that would be out of place.