Following are some of the major events to have occurred on Apr 22
1915 – The second battle of Ypres started when German troops released clouds of deadly chlorine gas on British troops. It was the first major gas attack of World War One.
1969 – The British yachtsman Robin Knox-Johnston arrived at Falmouth after completing the first solo non-stop circumnavigation of the Earth, in 312 days.
1994 – Former U.S. president Richard Nixon died aged 81. He was the 37th president of the United States from 1969 until his resignation in 1974 over the Watergate scandal.
1997 – Peruvian troops stormed the Japanese ambassador’s residence in Lima, freeing 71 hostages held by Marxist Tupac Amaru guerrillas. One hostage, three soldiers and all 14 guerrillas were killed.
2000 – Cuban shipwreck survivor Elian Gonzales is taken by U.S. Federal agents from his Miami relatives.
2002 – Former Sotheby’s chairman Alfred Taubman was sentenced to a year and a day in prison and fined $7.5 million for fixing commission fees with rival auctioneer Christie’s.
2004 – A train laden with explosives blew up at a station near the centre of Ryongchon in North Korea. At least 161 people were killed, hundreds injured and nearly 2,000 homes destroyed in the blast.
2005 – Zacarias Moussaoui, the only person charged in the United States in connection with the Sept. 11 attacks, pleaded guilty and said Osama bin Laden had hand-picked him to fly a plane into the White House.
2008 – U.S. Air Force retires remaining F-117 Nighthawk aircraft from service.
2014 – First PLO delegation in Gaza since 2007 arrives for unity talks with Hama.
2016 – Paris Agreement on climate change ratified at United Nations in New York.