Here is a list of things which happened on the 27th of July over the years:
The first U.S. federal government agency, the Department of Foreign Affairs, is established (later renamed Department of State). (1789)
French revolutionary leader Maximilien Robespierre was overthrown and placed under arrest; he was executed the following day. (1794)
After two failures, Cyrus W. Field succeeded in laying the first underwater telegraph cable between North America and Europe. (1866)
Researchers at the University of Toronto led by biochemist Frederick Banting announce the discovery of the hormone insulin. (1921)
Korean War ends: The United States, People’s Republic of China, and North Korea, sign an armistice agreement. Syngman Rhee, president of South Korea, refuses to sign but pledges to observe the armistice. (1953)
Vice President Richard M. Nixon was nominated for president at the Republican National Convention in Chicago. (1960)
The F-15 Eagle flies for the first time. (1972)
Watergate Scandal: The House of Representatives Judiciary Committee votes 27 to 11 to recommend the first article of impeachment against President Richard Nixon: obstruction of justice. (1974)
In Washington, DC, the Korean War Veterans Memorial is dedicated. (1995)
Centennial Olympic Park bombing: In Atlanta, Georgia, a pipe bomb explodes at Centennial Olympic Park during the 1996 Summer Olympics. Alice Hawthorne is killed, and a cameraman suffered a heart attack fleeing the scene. 111 injured. (1996)
Ukraine airshow disaster: A Sukhoi Su-27 fighter crashes during an air show at Lviv, Ukraine killing 85 and injuring more than 100 others, the largest air show disaster in history. (2002)
The Federal Republic of Germany is deemed guilty in the loss of Bashkirian 2937 and DHL Flight 611, because it is illegal to outsource flight surveillance. (2006)
Phoenix News Helicopter Collision: News helicopters from Phoenix, Arizona television stations KNXV and KTVK collide over Steele Indian School Park in central Phoenix while covering a police chase; there are no survivors. This is the first known incidence of two news helicopters colliding in mid-air, and the worst civil aviation incident in Phoenix history. (2007)