Today in History: April 12, Yuri Gagarin becomes first human in space

Today in History: April 11, the liberation of Buchenwald

Today in History: April 10, Northern Ireland’s Good Friday Agreement

Today in History: April 9, Robert E. Lee surrenders to Ulysses S. Grant at Appomattox

Today in History: April 8, Hank Aaron breaks Babe Ruth’s home run record

Today in History: April 7, Rwandan genocide begins