I wouldn't advise [people] to be silent.

When we think of the major threats to our national security, the first to come to mind are nuclear proliferation, rogue states and global terrorism. But another kind of threat lurks beyond our shores, one from nature, not humans - an avian flu pandemic.

We need to spend a trillion dollars rebuilding our schools, our roads, our basic science and research here in the United States.

I believe in keeping guns out of our inner cities, and that our leaders must say so in the face of the gun manufacturer's lobby.

We are willing to uphold principles that have resulted in unprecedented prosperity and security throughout Europe and around the world. With the threat of climate change only becoming more urgent, Angela [Merkel] and I focused on the need for American and E.U. leadership to advance global cooperation.

Men have to take more responsibility. Men have to intervene

It will take time to eradicate a cancer like Isil. And any time we take military action, there are risks involved - especially to the servicemen and women who carry out these missions. But I want the American people to understand how this effort will be different from the wars in Iraq and Afghanistan. It will not involve American combat troops fighting on foreign soil.