President Obama signs the Affordable Care Act in the East Room of the White House on March 23, 2010. Data suggest that racial attitudes of ordinary Americans shape both how they feel about the health care overhaul and how intense those feelings are.
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A drilling rig sits on Oooguruk Island off the coast of Alaska's North Slope. The 6-acre island was built by Pioneer Natural Resources so it could drill for oil on the Arctic Ocean.
Afghans gather outside a military base in the Panjwai district in Afghanistan on March 11, after 16 civilians were killed in a massacre allegedly carried out by a U.S. soldier.