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From today's featured article Trinity detonation Trinity was the code name given to the nuclear test that saw the first detonation of a nuclear weapon. The code name was assigned by J. Robert Oppenheimer, the director of the Los Alamos Laboratory, after a poem by John Donne. It was conducted on July 16, 1945, as part of the Manhattan Project on the Alamogordo Bombing and Gunnery Range in the Jornada del Muerto desert. The test used a Fat Man bomb of the same design as that detonated over Nagasaki. The complex design of the implosion-type nuclear weapon required a major effort from the Los Alamos Laboratory, and testing was required to allay fears that it would not work. Its detonation (video featured) produced the explosive power of about 20 kilotons of TNT (84 terajoules). The test site is now part of the White Sands Missile Range. It was declared a National Historic Landmark District in 1965, and listed on the National Register of Historic Places the following year. (This article is part of a featured topic: History of the Manhattan Project.) Recently featured: Manitoba William Hanna Heartburn Did you know... A sketch of Preston Porter Jr. ... that despite the presence of 300 witnesses, an inquest concluded that the lynching of Preston Porter Jr. (pictured) was carried out "at the hands of parties unknown"? ... that a forest in northern Wisconsin was subject to nuclear-radiation testing in the 1970s? ... that a photograph of Lesotho sprinter Motsapi Moorosi was sent into space on the Voyager Golden Records? ... that a studio portrait of the Bundoo Girls, who belonged to a secret society in Sierra Leone, was taken by Alphonso Lisk-Carew and sold as a postcard to tourists? ... that architect Arthur Loveless was a collector of Chinese snuff bottles? ... that Formula One races in Golden Lap are simply colored dots traveling along a thick line? ... that a recent international aid vessel bound for Gaza counted among its crew Greta Thunberg and a French member of the European Parliament? ... that there was a 24-year gap between the first Romanian Olympian and the next? ... that Little Benjamin the Ruler is buried in the churchyard of St Anne's Church, Lewes, but nobody knows who he was? Other areas of Wikipedia Community portal – The central hub for editors, with resources, links, tasks, and announcements. Village pump – Forum for discussions about Wikipedia itself, including policies and technical issues. Site news – Sources of news about Wikipedia and the broader Wikimedia movement. Teahouse – Ask basic questions about using or editing Wikipedia. Help desk – Ask questions about using or editing Wikipedia. Reference desk – Ask research questions about encyclopedic topics. Content portals – A unique way to navigate the encyclopedia. In the news Abdul Hakim Haqqani The International Criminal Court issues arrest warrants for Taliban leaders Hibatullah Akhundzada and Abdul Hakim Haqqani (pictured) over their alleged persecution of women in Afghanistan. Flooding in Central Texas, United States, leaves at least 130 people dead. Astronomers announce the discovery of 3I/ATLAS, an interstellar object passing through the Solar System. The Vera C. Rubin Observatory in Chile releases the first light images from its new 8.4-metre (28 ft) telescope. Ongoing: Gaza war Russian invasion of Ukraine timeline Sudanese civil war timeline Recent deaths: Frank Barrie Ihor Poklad Glen Michael Ian Blair Lee Elia Bradman Weerakoon Wikipedia is a multilingual, free-content encyclopedia project  based on an openly editable model. Our goal is to create a complete, accurate and neutral encyclopedia. All content are released under CC BY-SA 3.0, everyone can freely use these contents under the terms of agreement. Site links Mobile access Milestones List of languages Wikimedia Foundation Contact us Non-English speakers New user Welcome Introduction About Wikipedia Help index Seek help Portals To editors Start editing Edit articles Edit practice Create articles Policies and guidelines Manual of Style

Today's featured picture Arp 273 Arp 273 is a group of interacting galaxies, lying 300 million light years away in the constellation Andromeda and first discovered in 1966. In this photograph from the Hubble Space Telescope, the larger of the spiral galaxies, known as UGC 1810, has a disk that is tidally distorted into a rose-like shape by the gravitational tidal pull of the companion galaxy below it, known as UGC 1813. A swath of blue jewels across the top is the combined light from clusters of intensely bright and hot young blue stars. Photograph: NASA, ESA, and the Hubble Heritage Team On this day July 16 Phạm Ngọc Thảo 1790 – President George Washington signed the Residence Act, selecting a new permanent site along the Potomac River for the capital of the United States, which later became Washington, D.C. 1950 – Korean War: A Korean People's Army unit massacred 31 prisoners of war of the U.S. Army on a mountain near the village of Tuman. 1965 – South Vietnamese Colonel Phạm Ngọc Thảo (pictured)—an undetected communist spy—was reported dead due to injuries sustained during his capture, but it is generally assumed he was killed on the orders of military officials. 1990 – A 7.8 MS earthquake struck the densely populated Philippine island of Luzon, killing an estimated 1,621 people. 2008 – A tainted milk powder scandal broke in China which ultimately involved an estimated 300,000 victims, the vast majority infants, with 54,000 hospitalized with kidney problems and six deaths. Mary Todd Lincoln (d. 1882) Stan McCabe (b. 1910) Will Ferrell (b. 1967) Alcides Ghiggia (d. 2015) More anniversaries: July 15 July 16 July 17 Donate to Wikipedia The free operation of Wikipedia needed everyones support. If you are benefited, please consider to donate to Wikipedia, thank you. Click here to donate

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