Which Cuban leader, who took power in 1959, ruled for decades under a U.S. trade embargo begun in the early 1960s?

In 1989, "the Godfather of Soul" James Brown sang "Gimme Your Love" with which "Queen of Soul"? In 1991, Bruce Willis reportedly rented Six Flags Magic Mountain for which actress's 29th birthday party? In 1991 he joined "Growing Pains" as Luke Brower; six years later he was "king of the world" in a movie. Who is he? In 1993, 18 U.S. soldiers were killed in a fierce battle in which African capital? In 1993, Julie Krone became the first female jockey to win a Triple Crown race, taking which third leg? In 1993, people sent letters bearing which new stamps to fake addresses so they'd be marked "Return to Sender"? In 1994, two days after Philippe Biamby and Raoul Cédras left Haiti for exile, which president returned? In 1995, the U.S. dollar hit a then-record low of about 80 units of which currency, of a former WWII opponent?