Arlington is a small city in the Seattle metropolitan area of northern Snohomish County in the U.S. state of Washington. It lies on the Stillaguamish River in the western foothills of the Cascade Range, adjacent to the city of Marysville and 10 miles (16 km) north of Everett. The population was 17,926 in the 2010 U.S. census. Arlington was established in the 1880s and incorporated as a city on May 20, 1903. During the Great Depression of the 1930s, federal projects in the Arlington area included a municipal airport that would serve as a naval air station during World War II. Beginning in the 1980s, Arlington became increasingly suburban, annexing new neighborhoods to the south and west. The economy of the Arlington area transitioned from timber and agriculture to a service economy in the late 20th century. A Boeing facility is in Everett, and Arlington's airport is home to many aerospace jobs. (Full article...)

Vikings invading Britain

• ... that Julian D. Richards is investigating the camp at Torksey of the Great Viking Army (Viking invaders pictured)?
• ... that the flatworm Polystoma integerrimum, a frog parasite, has a life cycle which synchronises with that of its host?
• ... that Union Army general Justus McKinstry, who recommended the appointment of Ulysses S. Grant to his first important command, was soon thereafter cashiered?
• ... that in addition to being the oldest racecourse and second-oldest golf course in Thailand, the Royal Bangkok Sports Club also served as its first airfield?
• ... that a coroner's inquest into the death of Ms Dhu found that she suffered "unprofessional and inhumane" treatment by police and "deficient" treatment by hospital staff?
• ... that after playing sparingly for Illinois State, Zeke Upshaw used a graduate transfer exception to continue his college basketball career with Hofstra and lead the CAA in scoring?
• ... that a 2009 recording of Louis Vierne's Messe solennelle for choir and two organs at Saint-Sulpice, where it was first performed in 1901, was called "musical and spiritual time-travel"?
• ... that an accidental release of farmed Atlantic salmon in Washington state was initially blamed on unusually strong tides during a solar eclipse?

The aircraft that crashed, pictured in 2011

• In the United Kingdom, Prince Harry marries Meghan Markle.
• A passenger aircraft (pictured) crashes shortly after takeoff from Havana, Cuba, killing 110 people.
• Israeli troops kill more than 60 Palestinians in the Gaza Strip, on the day the United States moves its embassy to Jerusalem.
• In association football, the English Premier League concludes with Manchester City winning the title.

May 20: Day of Remembrance in Cambodia; National Awakening Day in Indonesia (1908); Sanja Matsuri ends in Tokyo (2018)

Luc Montagnier

• 794 – According to the Anglo-Saxon Chronicle, King Æthelberht II of East Anglia was beheaded on the order of King Offa of Mercia.
• 1873 – Levi Strauss and Jacob Davis received a patent for using copper rivets to strengthen the pockets of denim overalls, allowing their company to start manufacturing blue jeans.
• 1882 – The Triple Alliance was created between the German Empire, Austria-Hungary and the Kingdom of Italy.
• 1983 – A team of researchers led by French virologist Luc Montagnier (pictured) published their discovery of HIV, but were not then certain that it caused AIDS.
• 2012 – The first of two major earthquakes struck Northern Italy, resulting in seven deaths.

Gero (d. 965) · William Fargo (b. 1818) · Yoshihiko Noda (b. 1957)