Cuba's coast guard killed four people on a speedboat from Florida who opened fire off the Cuban coast on Wednesday, the interior ministry in Havana said. The people were armed and shooting at Border Guard Troops as they approached, according to Cuban authorities. It is not clear who was in the Florida-registered speedboat, where they were from, or what their reason was for entering Cuban waters or allegedly opening fire. Secretary of State Marco Rubio said the U.S. government doesn't have other