The city comptroller's office says there are "more than half a billion dollars in lawsuits" stemming from the fatal crane collapses earlier this year. The families of two constructions workers who died have filed notices of claim for the May 30 collapse on East 91st Street; Ramadan Kurtag's family plans to sue for $75 million while Donald Leo's family's claim is for $20 million. The Daily News reports there are also "several smaller claims ranging......