Cuba began its biggest military maneuvers in five years on Thursday, saying they were needed to prepare for a possible invasion by the United States. Despite a thaw in U.S.-Cuba relations and assurances last week by President Barack Obama that the United States has no intention of invading the island 90 miles from Florida, Cuba's state-run press quoted military leaders as saying there "exists a real possibility of a military aggression against Cuba." The war games, which are being called "Bastion 2009," also will get the military ready to deal with social unrest the United States may try to foment...