By The Associated Press

Today is Tuesday, Sept. 6, the 250th day of 2016. There are 116 days left in the year.

Today’s Highlight in History:

On Sept. 6, 1916, the first self-serve grocery store, Piggly Wiggly, was opened in Memphis, Tennessee, by Clarence Saunders. (The store was set up to allow customers to hand-pick their groceries from shelves, rather than request them from a clerk standing behind a counter.)

On this date:

In 1861, Union forces led by Gen. Ulysses S. Grant occupied Paducah, Kentucky, during the Civil War.

In 1901, President William McKinley was shot and mortally wounded by anarchist Leon Czolgosz at the Pan-American Exposition in Buffalo, New York. (McKinley died eight days later; Czolgosz was executed on October 29.)

In 1925, the silent film horror classic “The Phantom of the Opera,” starring Lon Chaney, had its world premiere at the Astor Theater in New York.

In 1939, the Union of South Africa declared war on Germany.

In 1943, 79 people were killed when a New York-bound Pennsylvania Railroad train derailed and crashed in Philadelphia.

In 1954, groundbreaking took place for the Shippingport Atomic Power Station in western Pennsylvania.

In 1966, birth control advocate Margaret Sanger died in Tucson, Arizona, at age 86, eight days before her birthday. South African Prime Minister Hendrik Verwoerd was stabbed to death by an apparently deranged page during a parliamentary session in Cape Town.