Today is Thursday, Aug. 11, the 224th day of 2016. There are 142 days left in the year.

On this date:

In 1860, the nation’s first successful silver mill began operation near Virginia City, Nevada.

In 1909, the steamship SS Arapahoe became the first ship in North America to issue an S.O.S. distress signal, off North Carolina’s Cape Hatteras.

In 1934, the first federal prisoners arrived at Alcatraz Island (a former military prison) in San Francisco Bay.

In 1954, a formal peace took hold in Indochina, ending more than seven years of fighting between the French and Communist Viet Minh.

In 1965, rioting and looting that claimed 34 lives broke out in the predominantly black Watts section of Los Angeles.

In 1975, the United States vetoed the proposed admission of North and South Vietnam to the United Nations, following the Security Council’s refusal to consider South Korea’s application.

In 1997, President Bill Clinton made the first use of the historic line-item veto, rejecting three items in spending and tax bills. (However, the U.S. Supreme Court later struck down the veto as unconstitutional.)

In 2014, Academy Award-winning actor and comedian Robin Williams, 63, died in Tiburon, California, a suicide.