Jackie Robinson, becomes the first African American player in Major League Baseball when he steps onto Ebbets Field in Brooklyn to compete for the Brooklyn Dodgers.

Two pressure cooker bombs were set off at the Boston Marathon near the finish line, killing three people and injuring another two hundred and sixty-four people. The suspected bombers were named as Dzhokar and Tamerlan Tsarnaev. Police eventually chased down the suspects during a confrontation in which Tamerlan was run over by Dzhokar while trying to escape. Dzhokar was found hiding in a residential area on April 19th and police took him into custody after a stand off.