Researchers say it may be possible to temporarily reduce racial biases. Images.com/Corbis hide caption

A Harrisburg Wild West artifact sits inside of a warehouse building owned by the city, seen here in 2011. Craig Layne/WITF hide caption

President Obama walks off the stage after speaking about the Affordable Care Act during an event in the East Room of the White House on Thursday. Obama argued that the law is holding insurance companies accountable and putting money back into the pockets of consumers. Susan Walsh/AP hide caption

The National Labor Relations Board building in downtown Washington. Jon Elswick/AP hide caption

Leonard Carpenter in Kentucky, where he grew up, in the early 1940s. Photo courtesy of Lynne Bruschetti hide caption

The key to Japan's economy? Courtesy of Cartoon Network hide caption

Tupac Shakur on the set of Poetic Justice. Everett Collection / Rex USA hide caption