This week in pictures (photo gallery)

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Boston Red Sox's Will Middlebrooks jumps into the stands to try and catch a foul ball hit by Cleveland Indians' Shelley Duncan in the second inning of a baseball game, Friday, Aug. 10, 2012, in Cleveland. Middlebrooks was unable to make the catch. (AP Photo/Tony Dejak)

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Tamara Vega, of Mexico, falls off her horse Douce de Roulad, during the equestrian show jumping stage of the women's modern pentathlon at the 2012 Summer Olympics, Sunday, Aug. 12, 2012, in London. (AP Photo/David Goldman)

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This photo provided by NASA's Jet Propulsion Laboratory shows the gravel on the surface of Mars' Gale Crater where the Curiosity rover landed late Sunday, Aug. 5, 2012 PDT. On the horizon is the rim of the crater. Part of the spring that released the lens' dust cover can be seen at the bottom right, near the rover's wheel. At top left is part of the rover's power supply. The lines across the top are an artifact from the sensor since the camera is looking into the sun. (AP Photo/NASA/JPL-Caltech)

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Multiple bolts of lightning streak to the ground as a severe thunderstorm moves through eastern Henderson County, Ky., Tuesday evening, July 31, 2012. The same storm system ripped through Southwestern Indiana, injuring at least four people and causing extensive damage. (AP Photo/The Gleaner, Mike Lawrence)

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United States Marine Cpl. Zach Briseno, front center, 25, from Fort Worth, Texas, is recognized before the start of the final round of the InVinci-Bull Youth Bull Riding World Finals on Saturday, Aug. 4, 2012, at the Taylor County Coliseum in Abilene, Texas. Briseno had both his legs amputated after sustaining injuries from a road-side bomb while serving in Fallujah, Iraq. (AP Photo/Abilene Reporter-News Tommy Metthe)

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In this Aug. 2, 2012 photo, thick fog descends upon the windjammer Angelique during a cruise in Penobscot Bay, Maine. (AP Photo/Robert F. Bukaty)

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Athletes compete in the men's 50-kilometer race walk at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London. (AP Photo/Emilio Morenatti)

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South Korea's head coach Hong Myung-bo is hoisted up by his players after the team won their men's soccer bronze medal match against Japan in Cardiff, Wales, at the 2012 London Summer Olympics, Friday, Aug. 10, 2012. (AP Photo/Luca Bruno)

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Germany's Moritz Fuerste, left, celebrates his team's 2-1 win against the Netherlands in the men's field hockey gold medal match at the 2012 Summer Olympics, in London, Saturday, Aug. 11, 2012. (AP Photo/Jae C. Hong)

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Thailand's Kaeo Pongprayoon, in blue, lies on the mat after losing to China's Zou Shiming in the men's light flyweight 49kg boxing gold medal match at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London. (AP Photo/Mark Duncan)

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China's Liu Xiaobo celebrates after defeating Turkey's Bahri Tanrikulu in their bronze medal match in the men's plus 80-kg taekwondo competition at the 2012 Summer Olympics, Saturday, Aug. 11, 2012, in London. (AP Photo/Ng Han Guan)

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Cuba's Robeisy Ramirez Carrazana reacts after being declared the winner over Mongolia's Tugstsogt Nyambayar in their flyweight 52-kg gold medal boxing match at the 2012 Summer Olympics, Sunday, Aug. 12, 2012, in London. (AP Photo/Patrick Semansky)

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United States' LeBron James and Kevin Durant react during the men's gold medal basketball game against Spain at the 2012 Summer Olympics, Sunday, Aug. 12, 2012, in London. USA won 107-100. (AP Photo/Charles Krupa)

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Worshipers in the Sikh community gather for a candle light vigil after prayer services at the Sikh Religious Society of Wisconsin, Monday, Aug. 6, 2012, in Brookfield, Wis. A gunman identified as former leader of a white supremacist heavy metal band killed six people at the Sikh Temple of Wisconsin in Oak Creek on Sunday before being shot to death by police. (AP Photo/M. Spencer Green)

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Seven-year-old Newlin Hu takes a photograph of Yonghui Ho, right, and Ziaoyan Liu, left, next to a sunflower field near Tonganoxie, Kan., Tuesday, July 31, 2012. Yonghui is studying at the University of Kansas. The family is from a small town near Shanghai, China. (AP Photo/Orlin Wagner)

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Sara Tiano, left, and Krystine Jacobsen, who both trained with Gabby Douglas, celebrate at Excalibur Gymnastics National Training Center in Virginia Beach, Va., as Virginia Beach native Gabby Douglas wins a gold medal in the gymnastics all-around Olympic title at the Olympics in London on Thursday, August 2, 2012. (AP Photo/The Virginian-Pilot, Steve Earley) MAGS OUT

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Jim Fortier, left, and Mark Toomajian, kiss as they join about two dozen members of gay rights groups and others protesting outside the Decatur, Ga., Chick-fil-A restaurant Friday, Aug. 3, 2012. Gay rights activists plan kiss demonstrations at Chick-fil-A stores Friday, just days after the company set a sales record when customers flocked to the restaurants to show support for the fast-food chain owner's opposition to gay marriage. (AP Photo/David Tulis)

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Lt. Michael Sturm, of Philadelphia Pa., hugs his fiance, Susan Brooks as he arrives aboard the nuclear powered aircraft carrier Abraham Lincoln arrives at Naval Station Norfolk in Norfolk, Va., Tuesday, Aug. 7, 2012. The Lincoln will be homeported in Norfolk for at least the next four years to receive upgrades. (AP Photo/Steve Helber)

AP

United States' Ashton Eaton gets a hug from his mother Roslyn Eaton, as his fiancee Brianne Theisen looks on, after winning the decathlon during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Thursday, Aug. 9, 2012. (AP Photo/Matt Dunham)

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Republican vice presidential candidate Rep. Paul Ryan, R-Wis., gives a thumbs-up at a rally Sunday, August 12, 2012, in Mooresville, N.C., at the NASCAR Technical Institute. (AP Photo/Jason E. Miczek)