STEVE DOOCY (HOST): In the wake of the Brussels attack, Ted Cruz and Donald Trump both agree that maybe there should be some patrolling of Muslim areas in the United States. Former New York City Mayor Rudy Giuliani used to survey and surveil the mosques here. So does it work?
RUDY GIULIANI: Well sure, I started that policy in 1994, because the bombing in 1993 of the World Trade Center was planned in a mosque in New Jersey.
DOOCY: In a public way.
GIULIANI: Yea, sure.
DOOCY: The sheik was preaching.
GUILIANI: The sheik was preaching and if worked your way in and you got into a couple of the private meetings, you pick up plenty of information. That's for example how the blind sheik was prosecuted and put in jail for 100 years. That's how they thwarted a plan in the 1990's to blow up the Brooklyn Bridge. The Holland tunnel.
BRIAN KILMEADE (HOST): What do you say to Bill Bratton?
GIUALIN: Why do you think my police commissioner at the time, first thing he did on September 11 was close down the bridges and tunnels to New Jersey? You know why he did that?
AINSLEY EARHARDT (HOST): Why?
GUILIANI: Because of the information we were getting from the mosques in New Jersey. He was afraid that that was going to unleash a group of cells in New Jersey, come into New York and do a bunch of small bombings.
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DOOCY: What about Ted Cruz saying that we be should be patrolling certain Muslim neighborhoods in the United States? That's what he's gotten a lot of push back on.
GIULIANI: Put the word some in and you're right. They shouldn't patrol every Muslim neighborhood. Most of them, like in New York City, most of the Muslim neighborhoods are extremely safe, decent neighborhoods. We do not have a radicalized Muslim population particularly in New York City. Certain parts of New Jersey there's a radicalized Muslim population and every once in a while in New York. So you've got to keep the option open of surveiling mosques. What Catholic priest, what Jewish rabbi, what protestant minister would care if I had a police officer -- they'd like it.