September 13, 2006 -- Two undercover NYPD cops in a sting operation used $7,000 and the Internet to build a truck bomb big enough to blow up a skyscraper, officials revealed yesterday. In what was dubbed "Operation Kaboom," every purchase the cops made was legal - and aroused little suspicion - even driving their simulated truck bomb throughout the city. Although the two cops had no specialized knowledge of bomb-making, they were able manufacture an explosive more powerful than the one used in the 1993 World Trade Center attack. "We did it with no difficulty whatsoever," said James Falkenrath, the...