A foreign policy adviser to President Obama said this evening that the Administration has "rehabilitated" the concept of human rights, tarnished by the Iraq war, in a way that laid the groundwork for international collaboration. Samantha Power, a senior director on the National Security Council best known for her human rights advocacy before she entered the White House, spoke at Columbia University in New York City two hours before the president's planned speech in Libya tonight. Obama "has used his pulpit and a number of speeches ... to kind of clear the brush that had gathered around the norms in...