On Aug. 6, 1945, during World War II, the U.S. B-29 Superfortress Enola Gay dropped an atomic bomb codenamed “Little Boy” on Hiroshima, Japan, resulting in an estimated 140,000 deaths. (Three days later, the United States exploded a nuclear device over Nagasaki; five days after that, Imperial Japan surrendered.)

Ten years ago

Oil giant BP announced an indefinite shutdown of the biggest oilfield in the U.S., at Prudhoe Bay in Alaska, after finding a pipeline leak. Sherri Steinhauer shot an even-par 72 to win the Women’s British Open for the third time, and the first since it became a major. Tiger Woods won his 50th PGA Tour title with a three-stroke victory over Jim Furyk in the Buick Open.

Five years ago

Insurgents shot down a U.S. military helicopter during fighting in eastern Afghanistan, killing 30 Americans, most of them belonging to the same elite Navy commando unit that had slain Osama bin Laden. Violence erupted in the north London district of Tottenham amid anger over the fatal police shooting two days earlier of Mark Duggan, a 29-year-old father of four; rioting and looting spread to other parts of the city and other English cities over the next several days, leaving five dead.

One year ago

The first Republican presidential debate aired on Fox News Channel; when the 10 candidates were asked whether any of them would not pledge to support the eventual GOP nominee, only Donald Trump raised his hand, saying, “I will not make the pledge at this time.” Jon Stewart bade an emotional goodbye after 16 years as host of Comedy Central’s “The Daily Show.” ‘’Hamilton,” the hip-hop flavored biography about Alexander Hamilton, the nation’s first treasury secretary, opened on Broadway.

— By The Associated Press