Mark Memmott

Usain Bolt is still the "world's fastest man."

The Jamaican sprinter has won the men's 100-meter race in an Olympic record time of 9.63 seconds. Just after 4:50 p.m. ET, he successfully defended the gold medal he won four years ago in Beijing.

Jamaica's Yohan Blake came in second today, giving him the silver medal. American Justin Gatlin was third, meaning he gets the bronze.

South Africa's Oscar Pistorius, the "Blade Runner" who has has artificial legs below the knees but overcame that challenge to become a world class runner, will not be in the finals of the men's 400-meters.

The results of Heat 2 in the semifinals were posted at 3:55 p.m. ET. Pistorius finished last out of eight competitors, nearly two seconds behind winner James Kirani of Grenada.

One month after his hopes were dashed on the same famous court at Wimbledon, Scotland's Andy Murray just won the men's tennis title at the London Olympics in front of a joyous home crowd.

He did it by defeating the same man who beat him at Wimbledon in July.

As The Guardian just reported:

"Here is perhaps the least surprising outcome of the Games: the awesome Williams sisters have secured the women's doubles for the United States, disposing of the Czech pair Hlavackova and Hradecka 6-4, 6-4. And Serena crowns a dominant display with a delightful twirl of celebration after plundering the gold medal point."

In what looks to be a new Olympics record, Tiki Gelana of Ethiopia just won the women's marathon in a time of 2:23.07.

Kenya's Priscah Jeptoo was second and Russia's Tatyana Petrova Arkhipova finished third.

As The Guardian notes, Gelana's "uncle Gezahegne Abera won men's marathon gold in Sydney 12 years ago."

Mary Keitany of Kenya, one of the pre-race favorites, came in fourth.

The previous women's Olympics record was 2:23.14.

Good morning.

While Bill takes a much-deserved mid-Olympics day off, we'll aim to keep up with what's going on in London.

The death of writer and cultural critic Gore Vidal on Tuesday, at the age of 86, means many are trying today to capture that man of words' life in just a few phrases:

Update at 1:45 p.m. ET. Adams Has Been Reinstated On Twitter:

Guy Adams just tweeted that "Oh. My Twitter account appears to have been un-suspended. Did I miss much while I was away?"

That doesn't change the thrust of our post. And we haven't heard back from Twitter about his questions regarding the suspension.

Update at 4:23 p.m. ET. Twitter's Response:

Police in Prince George's County, Md., "have arrested a man who [they say] referred to himself as 'a joker' and threatened to shoot people at his former workplace," The Washington Post's The Crime Scene blog writes.

Fast food's Chick-fil-A has been at the center of the culture wars in recent days because of company President Dan Cathy's outspoken opposition to gay marriage.

Outrage in China about the dozens of deaths last weekend when Beijing's drainage system couldn't cope with heavy rains and much of the city was flooded has been followed by more frustration and anger today.

Last week there were the pictures of an iceberg twice the size of Manhattan breaking off Greenland's Petermann Glacier.

Now there are NASA images showing that in four days earlier this month, "Greenland's surface ice cover melted over a larger area than at any time in more than 30 years of satellite observations."

Sales of guns have risen strongly in Colorado since the early Friday shootings at a movie theater near Denver that left 12 people dead and 58 wounded.

The Denver Post reports that:

Baseball fans love perfect moments.

-- Babe Ruth hitting his "called shot."

-- Ted Williams homering in his last at-bat (and not tipping his cap).

-- Willie Mays and "the catch."