On This Day: April 19th

The Ingenuity helicopter becomes the first aircraft to achieve flight on another planet.

A killing spree in Nova Scotia, Canada, leaves 22 people and the perpetrator dead, making it the deadliest rampage in the country's history.

Boston Marathon bombing suspect Tamerlan Tsarnaev is killed in a shootout with police. His brother Dzhokhar is later captured hiding in a boat inside a backyard in the suburb of Watertown.

Fidel Castro resigns as First Secretary of the Communist Party of Cuba after holding the title since July 1961.

The Quito Ultratumba nightclub fire in Quito, Ecuador, kills 19 people and injures at least 24 more.

Cardinal Joseph Ratzinger is elected to the papacy and becomes Pope Benedict XVI.

Space Shuttle Endeavour is launched on STS-100 carrying the Canadarm2 to the International Space Station.

Air Philippines Flight 541 crashes in Samal, Davao del Norte, killing all 131 people on board.

The German Bundestag returns to Berlin.

Oklahoma City bombing: The Alfred P. Murrah Federal Building in Oklahoma City, US, is bombed, killing 168 people including 19 children under the age of six.