New York City bus drivers have ended a month-long strike after failing to win concessions from Mayor Michael Bloomberg. More than 8,000 school bus drivers and matrons have been off the job since mid-January seeking guarantees over job security and the outsourcing of their contracts. New York City has put its deals with the private bus companies that hire the drivers up for bidding, a move the drivers say could threaten their jobs at the end of the school year. The bus drivers’ union says they’ve given up trying to secure a deal with Bloomberg and will try again with his eventual successor.