NEW YORK, Feb. 10 The U.S. Department of Homeland Security plans to install a ring of sensors around New York City to detect nuclear or dirty bombs, Washington officials said.The $46 million project expands the emphasis of the detection effort from earlier programs that focused on detecting bombs being smuggled into the city by sea, CNN reported Saturday.Detectors will be placed along highways, at truck stops and other locations. The sites will not be made public for obvious reasons, the official said. The detectors would be able to warn officials of conventional nuclear bombs, as well as dirty bombs, that release radiation without exploding, CNN said. Homeland Security's 2008 budget proposal would include $30 million for the Securing the Cities initiative, on top of the $16 million already spent, CNN said. New York would be a test site for other cities. We expect to have this operational this year, the official said. Copyright 2007 by UPI