May 23, 2013 — Organizing for Action — a group that formed out of President Obama's re-election campaign — has focused its ire on Republicans it calls "climate change deniers." But some environmentalists are frustrated with the president himself on issues like the Keystone pipeline.
May 23, 2013 — When researchers challenged people with heart disease to perform some stressful tasks, those who took a popular antidepressant had fewer symptoms related to reduced blood flow to the heart. The findings, though preliminary, suggest another avenue for treatment.
May 23, 2013 — Ibragim Todashev, law enforcement sources tell NPR and other news outlets, was being questioned about the 2011 killings of three men in Waltham, Mass. Boston bombings suspect Tamerlan Tsarnaev has also been linked to that unsolved case.