Kerim Okten / EPA

Blind Brazilian runner Terezinha Guilhermina and her guide Guilherme Soares de Santana react after crossing the finish line to win the Women's 100m T11 final at the Paralympic Games in London on Wednesday night. 

Blind or partially-sighted athletes are permitted to use a guide runner in Paralympic races, but the guide is never permitted to cross the finish line before the blind runner. At the 2012 Games, guides became eligible for medals for the first time.

 Video: Team USA guns for Oscar Pistorius in 100m showdown

24 hours earlier Guilhermina's bid for 400m glory was derailed when Soares de Santana tripped on the home straight, a moment captured in a series of heartbreaking images published on PhotoBlog.

But their despair was replaced by joy as Guilhermina took the 100m gold in a world record time of 12.01 seconds, adding to the 200m title she won on Sunday.

Suzanne Plunkett / Reuters

Kerim Okten / EPA

Julian Finney / Getty Images

Julian Finney / Getty Images

Related content:

• Oscar Pistorius sorry for timing, not content, of angry outburst at Paralympics
• Iraq vet: 'Now it's time to win' at Paralympics
• Ex-Marine Angela Madsen on her journey from homelessness to Paralympics
• Nightly News: Representing Afghanistan at the Paralympic Games
• 'Meet the Superhumans': Paralympians burst onto world stage
• More images from the Paralympic Games on PhotoBlog

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Julian Finney / Getty Images

Terezinha Guilhermina of Brazil runs as her guide Guilherme Soares de Santana lies on the track after he fell in the Women's 400m - T12 Final on day 6 of the London 2012 Paralympic Games at Olympic Stadium on Sept. 4, in London, England.

Julian Finney / Getty Images

Assia El Hannouni of France wins gold in the Women's 400m - T12 Final on day 6 of the London 2012 Paralympic Games at Olympic Stadium on Sept. 4, in London, England.

Christopher Lee / Getty Images

Terezinha Guilhermina of Brazil and her guide Guilherme Soares de Santana lie on the track after falling in the Women's 400m - T12 Final on day 6 of the London 2012 Paralympic Games at Olympic Stadium on Sept. 4, in London, England.

Leon Neal / AFP - Getty Images

Brazil's Terezhina Guilhermina and her guide Guilherme Soares de Santana console each other after Soares de Santana fell just ahead of the finish line of the women's 400m T12 final at the Paralympic Games at the Olympic Park in east London, England on Sept. 4.

Update, September 6th: The night after these pictures were taken Terezinha Guilhermina and Guilherme Soares de Santana returned to the track, and this time their race had a much happier ending. Find out what happened when they competed in the 100m final.

Related content:

• Video: Team USA guns for Oscar Pistorius in 100m showdown 
• Oscar Pistorius sorry for timing, not content, of angry outburst at Paralympics
• Iraq vet: 'Now it's time to win' at Paralympics
• Ex-Marine Angela Madsen on her journey from homelessness to Paralympics
• Nightly News: Representing Afghanistan at the Paralympic Games
• 'Meet the Superhumans': Paralympians burst onto world stage
• More images from the Paralympic Games on PhotoBlog

Follow @NBCNewsPictures

Sign up for the NBCNews.com Photos Newsletter

Jim Hollander / EPA

A marathon runner carries a Palestinian and Israeli flag as well as a a white flag with a Peace symbol as he enters the Zion Gate, after passing two Israeli Border Policemen during the Jerusalem Marathon, in Jerusalem, on March 16. It is the second year the Jerusalem Marathon has been organized and the three events, a full marathon, a half marathon and a 10 kilometers run, attracted some 15,000 participants on a chilly and rainy day in Jerusalem.

Sebastian Scheiner / AP

77-year-old Holocaust survivor Hanoch Shahar, center, runs in Jerusalem, on March 16. About 15,000 runners, including 1,500 from overseas, are competing Friday, with some 1,000 competitors expecting to complete the full 42 kilometers (26.2 miles) marathon distance, with others aiming to complete shorter distances, including Mayor Nir Barkat who says he plans to run half a marathon and 77-year old Hanoch Shahar aiming for 10km.

JERUSALEM -- Hanoch Shahar discovered a lifelong love of running as a child orphaned in World War II. On Friday, the 77-year-old Holocaust survivor ran along with some 15,000 other athletes in Jerusalem's second annual marathon.

The oldest of the runners, Shahar ran 6 miles in an hour and four minutes. He completed a full marathon two months ago and said at his age, he can run only one 26-mile race a year.

"Running gives me a sense of freedom," said Shahar, whose parents were killed by Nazis at the Theresienstadt concentration camp in what is now the Czech Republic. He said he ran there to escape his sorrow.

After the war, in a Prague orphanage, he would pass his time running and listening to track events on the radio. For hours at a time, he said, he would chase the orphanage's German Shepherd.

"That's where I got the running bug," he said.

On Friday, he and thousands of other runners dashed alongside ancient sites and through Jerusalem's steep streets in the second event of its kind in the city. The route took runners through the walled Old City, alongside the president's residence and up Mount Scopus to circle the campus of the Hebrew University of Jerusalem.

"To run through the Old City is an amazing experience," Shahar said as he boarded a bus back to his home town of Safed in northern Israel.

Read the full story.

-- Associated Press

Sebastian Scheiner / AP

Runners are seen next the Jerusalem's old city Zion Gate during the second annual marathon in Jerusalem, on March 16.