I'm sure that, throughout the hundred-thousand-odd years of our species' existence, and even before, 我十分确信在人类诞生以来的大概10万多年，甚至比这更长的时间里 our ancestors looked up at the night sky, and wondered what

PRESIDENT OBAMA: Well, I just had an excellent discussion with President Lee and his team. Obviously we are marking the 60th anniversary of the Korean War and the extraordinary friendship and alliance

Weekly Address: Reversing a Troubling Trend in Food Safety In this week's address, President Barack Obama makes key announcements regarding the safety of our nation's food. "We are a nation built on t

Hi, everybody. This week, we made it official -- I'm going to Cuba. When Michelle and I go to Havana next month, it will be the first visit of a U.S. president to Cuba in nearly 90 years. And it build

So if I’ve got one message, my message is now is the time to invest in America. Now is the time to invest in America. (Applause.) Today, American companies have nearly $2 trillion sitting on the