President Obama is making an historic visit to Cuba this week. If his trip has made you wonder who exactly is allowed to visit Cuba these days, this site from the U.S. Department of State should answer your questions. See particularly the section on "Entry, Exit & Visa Requirements:"
If you would love to visit Cuba but don't meet the
criteria for approved travel, you may have to make do by renting a
classic car, going out for a Cuban sandwich, and watching some "I Love