(NEW YORK) -- Ten years after the 9/11 terror attacks, Americans still wonder whether the nation's largest city is safer now than it was on that fateful day.
Since New York City police rushed to the World Trade Center on Sept. 11, 2001, there have been 13 terror plots against the city.
"They've all been thwarted through a combination of good work, good partnership with federal authorities and luck, and we'll take luck every time," says New York City Police Department Commissioner Ray Kelly.
The NYPD is still the frontline in protecting against another attack, but Kelly says that line has become thinner.
"We're down 6,000 police officers from where we were in 2001," he says.
To compensate, the commissioner has changed the ranks. Officers now train to detect radiation, and the NYPD has investigators in a dozen countries and officers who speak Arabic, Farsi and other so-called sensitive languages.
"There are some holes but we're taking care of business here as best we can," reassures Kelly.
And the new measures seem to be working. Polls in New York City show that worry about another terror attack is at its lowest point since 2001.
Kelly adds that while "it's safer than it certainly has been, there are no guarantees."
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