Police Commissioner Ray Kelly said the city's police department could take down a plane if necessary.

Speaking during a CBS "60 Minutes" interview that aired Sunday, the city's top cop said that that after the September 11 attacks, he decided the city couldn't rely on the federal government alone and set to create the NYPD's own counter-terrorism unit.

He said 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.

Mayor Michael Bloomberg said on Monday that the NYPD has thwarted a number of terror attacks.

"In 10 years, we seem to have stopped a number — and who knows how many additional that we don’t know about — attempts to have terrorism here while terrorism did rear its ugly head tragically in other places places," Bloomberg said. "And we’re going to continue to do everything we can."

With Yasmeen Khan and the Associated Press