On This Day, April 19
- 2021: The Ingenuity helicopter becomes the first aircraft to achieve flight on another planet.
- 2020: A killing spree in Nova Scotia, Canada, leaves 22 people and the perpetrator dead, making it the deadliest rampage in the country's history.
- 2013: 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.
- 2011: Fidel Castro resigns as First Secretary of the Communist Party of Cuba after holding the title since July 1961.
- 2008: The Quito Ultratumba nightclub fire in Quito, Ecuador, kills 19 people and injures at least 24 more.