On this date

In 1799, French soldiers in Egypt discovered the Rosetta Stone, which proved instrumental in deciphering ancient Egyptian hieroglyphs.

In 1870, Georgia became the last Confederate state to be readmitted to the Union.

In 1910, the term “Alzheimer’s disease” was used to describe a progressive form of presenile dementia in the book “Clinical Psychiatry” by German sychiatrist Emil Kraepelin, who credited the work of his colleague, Alois Alzheimer, in identifying the condition.

In 1971, President Richard Nixon delivered a televised address in which he announced that he had accepted an invitation to visit the People’s Republic of China.

In 1996, MSNBC, a 24-hour all-news network, made its debut on cable and the Internet.

In 1997, fashion designer Gianni Versace, 50, was shot dead outside his Miami Beach home; suspected gunman Andrew Phillip Cunanan, 27, was found dead eight days later, a suicide. (Investigators believed Cunanan killed four other people before Versace in a crosscountry spree that began the previous March.)

In 2010, after 85 days, BP stopped the flow of oil from a blown-out well in the Gulf of Mexico using a 75-ton cap lowered onto the wellhead earlier in the week.

Ten years ago: After more than a month’s delay, space shuttle Endeavour and seven astronauts thundered into orbit on a flight to the international space station.

Five years ago: More than 20 people died when a Moscow subway train derailed during rush hour.

One year ago: President Donald Trump arrived in Finland for a summit with Russian President Vladimir Putin. Earlier, in an interview with CBS News, Trump named the European Union as a top adversary of the United States.