Historical events occurring on April 21 and 22

On April 21, key events included the death of author Mark Twain in 1910 and the death of pilot Manfred von Richthofen in 1918. In 1960, Brasilia became the capital of Brazil, and in 1967, a military coup established the regime of the Greek Colonels. Protests occurred in Beijing in 1989 and in France in 2002 following Jean-Marie Le Pen's election success. April 22 marks the start of the second battle of Ypres in 1915, involving the first major chlorine gas attack. In 1969, Robin Knox-Johnston completed the first solo non-stop circumnavigation. Richard Nixon passed away in 1994, and in 1997, Peruvian troops ended a hostage crisis at the Japanese ambassador’s residence, resulting in 19 total deaths. Additionally, in 2004, a train explosion in Ryongchon, North Korea, killed at least 161 people and destroyed nearly 2,000 homes.