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Havana (CNN)While full diplomatic relations between the United States and Cuba were recently restored, many Americans still rightfully wonder what's changed as a result of America's new policy with the communist-run island nation. Since we're talking about Cuba, don't expect everything to be perfectly clear: 1. How can Americans legally visit Cuba? U.S. citizens need approval from the Treasury Department to spend money in Cuba. Since the end of the Eisenhower administration, most business transactions with Cuba are banned and punishable with hefty fines or even jail time. Cuba remains the only country in the world off-limits to U.S. tourists. That said, it's recently become much easier for Americans to legally visit the island just 90 miles off the coast of the U.S. for reasons other than tourism. In January 2015, President Barack Obama expanded the categories of authorized travel to Cuba. U.S. citizens can legally travel to Cuba if they are engaging i...