Today is Tuesday, April 12, the 103rd day of 2016. There are 263 days left in the year.

Today’s birthdays: Actress Jane Withers is 90. Opera singer Montserrat Caballe is 83. Jazz musician Herbie Hancock is 76. Rock singer John Kay (Steppenwolf) is 72. Actor Ed O’Neill is 70. Former talk show host David Letterman is 69. Author Scott Turow is 67. Singer David Cassidy is 66. Actor Andy Garcia is 60. Country singer Vince Gill is 59. Singer Amy Ray is 52. Actress Claire Danes is 37. Actress Saoirse Ronan is 22.

In 1861, the US Civil War began as Confederate forces opened fire on Fort Sumter in South Carolina.

In 1945, President Franklin D. Roosevelt died of a cerebral hemorrhage in Warm Springs, Ga., at age 63.

In 1955, the Salk vaccine against polio was declared safe and effective.

In 1961, Soviet cosmonaut Yuri Gagarin became the first man to fly in space, orbiting the Earth once.

In 1963, civil rights leader Martin Luther King, Jr. was arrested and jailed in Birmingham, Ala., charged with contempt of court and parading without a permit. (During his time behind bars, King wrote his ‘‘Letter from Birmingham Jail.’’)

In 2006, jurors in the Zacarias Moussaoui trial listened to a recording of shouts and cries in the cockpit as desperate passengers twice charged hijackers during the final half-hour of doomed United Flight 93 on 9/11.

Last year, Hillary Clinton jumped back into presidential politics, announcing in a video her much-awaited second campaign for the White House.