Aye or kubatons or other "bludgining" (is that spelled right?) instruments. Even worse (imagne the irony here..yes I know it is stereotypic) When I connect thru NRT, they take away and make me check (even without leaving secure area) my camera tripod. Thought I was just being unlucky the 1st time, but it happened a 2nd time. I check it now. Seems they have "length" requirements on how long one can be for NRT, even if it passes "carryon requirements" their connecting security staff measures it compressed and says it is too big.