"Here at home, we will strengthen our defenses, but we will 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. That is exactly what our adversaries want, and so long as I am President, we will never hand them that victory. We will define the character of our country, not some band of small men intent on killing innocent men, women and children." —President Obama today