Obama in Cuba on historic visit

By Matt Spetalnick, Daniel Trotta and Jeff Mason HAVANA (Reuters) - President Barack Obama arrived to small but cheering crowds on Sunday at the start of a historic visit to Cuba that opened a new chapter in U.S. engagement with the island's Communist government after decades of hostility between the former Cold War foes. The three-day trip, the first by a U.S. president to Cuba in 88 years, is the culmination of a diplomatic opening announced by Obama and Cuban President Raul Castro in December