Box cutters were used as a weapon by the Sept . 11 , 2001 , hijackers and have since been banned as carry-on items .
Box cutters were used as a weapon by the Sept . 11 , 2001 , hijackers and have since been banned as carry-on items .
Box cutters were the weapons used by the 19 hijackers in the Sept . 11 , 2001 , attacks .