NYPD chief: Police could take down plane if needed

Commissioner Ray Kelly tells CBS' "60 Minutes" that after the Sept. 11 attacks, he decided the city couldn't rely on the federal government alone. He set about creating the NYPD's own counter-terrorism unit. He says the department is prepared for multiple scenarios and could even take down a plane.

Kelly didn't divulge details but said "obviously this would be in a very extreme situation."

Other measures include sending NYPD officers abroad, using radiation detectors and creating a network of surveillance cameras in Manhattan.