On April 22

American climate activist Wynn Bruce set himself on fire outside the United States Supreme Court Building in an apparent protest against the climate crisis.

The Paris Agreement, an international treaty on climate change, opened for signature and was signed by 175 parties.

The Royal Canadian Mounted Police arrested two men who were plotting to commit terrorist attacks against Via Rail operations.

Flammable cargo exploded at a railway station in Ryongchon, North Korea, killing at least 54 people and injuring more than a thousand others.

In a pre-dawn raid, U.S. federal agents seized six-year-old Elián González from his relatives' home in Miami and returned him to his Cuban father.

Stephen Lawrence, a black British teenager, was murdered while waiting for a bus in Eltham, London, leading to cultural changes of attitudes on racism and the police, and to the law and police practice.

Korean War: The Chinese People's Volunteer Army attacked positions occupied mainly by Australian and Canadian forces, starting the Battle of Kapyong.

Civil War in Mandatory Palestine: The Jewish paramilitary group Haganah captured Haifa from the Arab Liberation Army.

About 600 prisoners of the Jasenovac concentration camp in the Independent State of Croatia revolted, but only 80 managed to escape while the remainder were killed by the Ustaše regime.

The short-lived Transcaucasian Democratic Federative Republic was established on territory formerly part of the Russian Empire.

The first meeting of the Colonial Defence Committee, a standing committee of the British Colonial Office, was held to discuss the defence of Barbados.

The U.S. Congress authorized the creation of a two-cent coin (pictured), the first U.S. currency to bear the phrase "In God We Trust".

Henry VIII became King of England, following the death of his father Henry VII, eventually becoming a significant figure in the history of the English monarchy.

A fleet commanded by Pedro Álvares Cabral (pictured) anchored off present-day Brazil; he later claimed the land for the Portuguese Empire.