Because of the internet and communications, the clash of cultures is much more direct. People feel, I think, less certain about their identity, less certain about economic security.

Here at home, we will strengthen our defenses but not succumb to a siege mentality that sacrifices the open society and liberties and values that we cherish as Americans, because great and proud nations don't hunker down and hide behind walls of suspicion and mistrust.

With the world's unprecedented inspections and access to Iran's program, we'll know if Iran ever tries to break out.

We've now got a group of young people in this country who for all practical purposes are American. They grew up here. They've gone to school here. They don't know anything other than being American kids. But their parents may have brought them here without all the proper paperwork - might have brought them here when they were three, might have brought them here when they were five. And so, lo and behold, by the time they finish school, and they're ready to go to college, they find out they can't go to college and, in fact, their status as Americans are threatened.

I have become a symbol of the possibility of America returning to our best traditions.

Every president who has tried to bring about big changes I think elicits the most passionate responses.

By some estimates, the oil you recently discovered off the shores of Brazil could amount to twice the reserves we have in the United States. We want to work with you. We want to help with technology and support to develop these oil reserves safely, and when you're ready to start selling, we want to be one of your best customers.