A firefighter looks on as a fast-moving wildfire approaches Elizabeth Lake Road in the Leona Valley near Palmdale, Calif., on Thursday, July 29. Mandatory evacuations were issued for the community of Leona Valley on Thursday evening, Los Angeles County fire inspector Matt Levesque said. Dan Steinberg/AP
With the Statue of Liberty behind them, a coalition of immigrant groups and their supporters march in the hundreds across the Brooklyn Bridge, on Thursday, in New York. Protesters are calling for the full repeal of Arizona's immigration law, saying it fuels a climate of racism. Seth Wenig/AP
Winner Yuliya Zarudneva of Russia (r.) and second placed Marta Dominguez of Spain react after competing in the women's 3,000 meter steeplechase final during the European Athletics Championships in Barcelona on Friday. Sergio Perez/Reuters
An Afghan National Army turret gunner inside a Humvee is bathed in sand from the rotor wash of a landing helicopter on a rescue mission, in Kandahar Province, southern Afghanistan, on Thursday. The US Air Force's 451st Air Expeditionary Wing based at Kandahar Air Field provides rescue operations and a variety of other air assets in southern Afghanistan. Brennan Linsley/AP
Local residents look at a heavy smog from a peat fire in a forest near the Russian town of Shatura, some 81 miles southeast of Moscow, on Thursday. Peat swamps started burning in central Russia following an unprecedented heat wave. Sergey Ponomarev/AP
In this photograph, employees sort garlic cloves at the Christopher Ranch, in Gilroy, Calif. The recovery lost momentum in the second quarter as growth slowed to a 2.4 percent pace, its most sluggish showing in nearly a year and too weak to drive down unemployment. Paul Sakuma/AP
Sunflowers and heart-shaped balloons are seen on Friday in the tunnel where revelers died during a stampede at the Love Parade techno festival, in Duisburg, Germany. Angry protesters demanded on Thursday that police and local officials be held accountable for the deaths of 21 revelers last weekend. Thomas Peter/Reuters
Sebastien Ogier of France races in his Citroen C4 during the Myhinpaa stage of the World Rally Championship, Rally of Finland, in Jyvaskyla on Friday. Roni Rekomaa/Lehtikuva/Reuters
A man holds makeshift jail bars as he protests for the release of Americans Josh Fattal, Shane Bauer, and Sarah Shourd during a demonstration outside the Iran Mission in New York, on Friday. The Americans have been jailed in Tehran's Evin prison since their arrest on July 31, 2009, when they were hiking along Iran's border with Iraq. Mike Segar/Reuters
President Obama, accompanied by assembly manager Teri Quigley, gets behind the wheel of the new Chevy Volt, during his tour of the General Motors Auto Plant in Hamtramck, Mich., on Friday. The plant is where the Volt, an electric car, will be assembled. Pablo Martinez Monsivais/AP
An aerial view shows the Pakistani city of Nowshera submerged in floodwater caused by heavy monsoon rains on Friday. The death toll in three days of flooding in Pakistan reached over 300 on Friday, rescue and government officials said, as rains bloated rivers, submerged villages, and triggered landslides. Mohammad Sajjad/AP
This photo provided by the NOAA National Weather Service shows a hailstone that was found by a ranch hand in Vivian, S.D., on June 23. Weighing 1 pound 15 ounces, the hailstone has set US record. The previous record for diameter was 7 inches for a hailstone found in Aurora, Neb., in 2003. National Weather Service/AP
Despite fierce resistance from groups such as the National Rifle Association – and safety and privacy concerns about the technology – many gun owners appear open to technology the Obama administration and many tech entrepreneurs say will reduce firearm deaths.
ByJoshua Eaton, Correspondent
As an engineer who has worked to ensure the safety of power plants and improve the performance of automotive airbags, Omer Kiyani has been drawn to jobs where he can help save lives.