Embracing Soviet-style communism, Fidel Castro overcame imprisonment and exile to become leader of Cuba and defy the power of the United States at every turn. The strongman’s half-century rule was marked by the unsuccessful U.S.-backed Bay of Pigs invasion in 1961 and the Cuban Missile Crisis a year later that brought the world to the brink of nuclear war. But after surviving a crippling trade embargo and dozens of assassination plots, Castro died in November at age 90.