not allowed on planes. reporter: new york senator chuck schumer joins unions representing pilots, flight attendants and federal air mal shals in publicly opposing the plan. delta airline ceo also expressed his objection in a letter sent to the agency. saying the change will, quote, add little value to the customer security process flow in relation to the additional risk for our cabin staff and customers. under the tsa s new policy, knives with blades shorter than 2.36 inches and less than a half an inch wide will be allowed provided the blade does not lock in place. larger knives, razor blades and box cutters are still banned. the tsa administrator says the change will allow screeners to focus on things that could bring down an aircraft like bombs. the key factor for me is that that may detract us, may, detract us from that item that