President Obama marked World AIDS Day Thursday by announcing plans to boost U.S. efforts to fight AIDS at home and abroad. Evan Vucci/AP hide caption

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President Obama received a warm welcome at Scranton High School in Scranton, Pa., Wednesday. A surge in Hispanic voters in that state could make his chances of winning it a little more likely. Carolyn Kaster/AP hide caption

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Foster care children are much more likely to be prescribed psychotropic drugs, a federal report finds. hide caption

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Demonstrators in London marched outside the Houses of Parliament on Wednesday to protest against pension cuts. The issue has stirred demonstrations in many parts of Europe and the U.S. Adrian Dennis/AFP/Getty Images hide caption

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Do you really need that MRI, or is your doctor just trying to make a buck? hide caption

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A placard of a child sits on a table during a conference Oct. 31 on human sex trafficking in Atlanta. The Georgia Department of Education estimates that about 5,000 girls in the state are at risk for trafficking each year. David Goldman/AP hide caption

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Sen. Sherrod Brown, D-Ohio, speaks on Capitol Hill about the Hire Heroes Act, which gives tax breaks to businesses that hire unemployed veterans. Vets that have served since 2001 face a higher unemployment rate than the population overall. Brendan Smialowski/Getty Images hide caption

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New York Police Department Commissioner Raymond Kelly (left) addresses questions as U.S. Attorney Preet Bharara listens during a news conference announcing the arrest of five police officers in October. Spencer Platt/Getty Images hide caption

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