(Reuters)    Hundreds of tourists and a handful of emotional Cuban-Americans arrived on the first U.S. cruise ship to sail to Havana in more than 50 years on Monday (April 4), spilling onto the cobbled streets of the old city where they were warmly greeted by residents. It was another first for the two countries since U.S. President Barack Obama and Cuban President Raul Castro announced a historic rapprochement in December 2014, and comes weeks […]