At 10:55 am ET (7:25 pm local), Air Force One touched down under the shroud of nightfall at Bagram Air Base in Afghanistan. President Obama had just made an unannounced 12 hour, 46 minute journey to m

Hi, everybody. This week, I welcomed President Hamid Karzai to the White House to discuss the way ahead in Afghanistan. And today, I want to update you on how we will end this war, bring our troops ho

Weekly Address: Two Major Reforms on Health Care & Higher Ed The President looks back on a week that saw the passage of two major sets of reforms: one putting Americans in control of their own hea

We know it because, if we look below the surface, we sense it still spreading on every continent 我们知道民主不会死亡．因为如果我们透过表面看问题、就会感觉到它仍在每一片大陆上扩展, for it is the most humane, the most advanced, and in the end

So they're learning from each other. And research bears this out. 乌鸦通过互相学习，都掌握了这种技巧。 Parents seem to be teaching their young. They learn from their peers, they learn from their enemies. 乌鸦父母还教会自己的孩子这样