Knocking down Detroit to revive it comes at a price

By Dave McKinney DETROIT (Reuters) - Nowhere in America bulldozes derelict homes with Detroit’s ferocity, as the city that has become a byword for U.S. urban decay seeks to engineer a recovery by tearing itself down. A year after the city exited the biggest-ever U.S. municipal bankruptcy, a plan to demolish half of its nearly 80,000 blighted or deteriorating structures -- nearly one in three city buildings -- is showing some signs of success.     The number of fires - often