President Barack Obama has hailed a renewed spirit of cooperation in the Americas, one in which the United States is an equal ...

U.S. President Barack Obama tried hard to avoid saying the \P\ word -- Pakistan -- on his recent trip to India., ...

Willenbring was director of treatment and recovery research at the National Institute on Alcohol Abuse and Alcoholism before ...

八年离开白宫后，曾以“希望与改变”打动美国的奥巴马（Barack Obama），如今正被迫重返政治战场。川普（Donald Trump）重掌权力、民主制度受威胁，让这位前总统不再确信，美国仍能如他当年所信的那样“撑过去”。

八年离开白宫后，曾以「希望与改变」打动美国的欧巴马（Barack Obama），如今正被迫重返政治战场。川普（Donald Trump）重掌权力、民主制度受威胁，让这位前总统不再确信，美国仍能如他当年所信的那样「撑过去」。据 ...