Today in history: On Feb. 16, 1959, Fidel Castro was sworn in as premier of Cuba, six weeks after dictator Fulgencio Batista announced his resignation and fled the country into exile. Also on this date: In 1862, the Civil War Battle of Fort Donelson in Tennessee ended with the surrender of some 12,000 Confederate soldiers; Union Gen. Ulysses S. Grant’s victory earned him the moniker “Unconditional Surrender Grant.” In1923, the burial chamber of King Tutankhamen’s recently unearthed tomb was