NEW YORK Mayor Michael Bloomberg has dropped plans to slash nearly 900 cops officers from the New York Police Departments budget - an abrupt about-face for which the failed Times Square car bombing is a perfect excuse, according to jubilant police officers. Bloombergs 2011 Executive Budget wont include a reduction in the 35,000-member police force deployed to keep New York City safe, said spokesman Stu Loeser. The turnabout comes as the NYPD is being hailed for its work since officers discovered terrorist Faisal Shahzads explosives-packed in Nissan Pathfinder in Times Square last Saturday. Cops swiftly and safely evacuated Times Square, and city detectives helped the FBI wrap arrest Shahzad within 54 hours, according to US media reports. Earlier this year, Bloomberg had been preparing to slash 892 NYPD jobs through attrition to save $55 million in related costs. Shahzad, 30, who has waived his right to remain silent and be presented in Federal Court speedily, told investigators that he received explosives training in his native Pakistan after traveling there last July, according to US media reports. The naturalized American has also told them the car bomb, which did not detonate, was intended to slaughter hundreds of innocent pedestrians in retaliation for US drone attacks that have killed Pakistani Taliban leaders. Shahzads plot failed because he put a non-explosive fertilizer in his homemade weapon, and used the wrong fireworks to ignite the potentially deadly device. He bought the incendiaries two months ago from a shop in Matamoros, Pennsylvania, whose owner told The Post that Shahzad clearly had no clue what he was doing. The fireworks - M-88 Silver Salutes - will explode only if they are individually lit, according to Bruce Zoldan, who owns the 55-store Phantom Fireworks chain. But Shahzad bought 152 of them and left them next to canisters of gasoline, propane and bags of fertilizer, thinking theyd all ignite if one were lit. The plan would have worked had Shahzad gone to the black market for illegal M-80s instead, Zoldan said. While registering to buy the fireworks in Pennsylvania, Shahzad gave his name in reverse order - Shahzad Faisal - to cover his tracks. Surveillance video from the store, which has been turned over to the FBI, shows Shahzad, clad in blue jeans and a green jacket, spending about a half-hour selecting various fireworks. At one point, he looks directly into a surveillance camera above the sales counter. He seemed very calm, just seemed inquisitive, wasnt nervous and didnt act in any way suspicious, Zoldan said.