It's time to send a clear message to the world: America seeks a world with no nuclear weapons.
We must never let down our guard, nor suffer another failure of imagination.
Barack Obama will lead a global effort to secure all nuclear weapons materials at vulnerable sites within four years.
Barack Obama will declare the cyber infrastructure a strategic asset, vital to national security and the global economy.
Barack Obama believes that we must urgently seek to reduce the risks from three potentially catastrophic threats: nuclear weapons, biologica...
Barack Obama understands our changing world.
Today, we confront the possibility of terrorists bent on our destruction possessing a nuclear weapon or bomb-making materials.
As president, he'll rebuild our alliances to take out terrorist networks.
I opposed going to war in Iraq; Senator McCain was one of Washington's biggest supporters for war.
We cannot tolerate nuclear weapons in the hands of nations that support terror.
I want America – once again – to lead.
I will send at least two additional combat brigades to Afghanistan, and use this commitment to seek greater contributions – with fewer restr...
That is an achievable goal if we pursue a comprehensive plan to press the Iraqis to stand up.
For weeks now, Senator McCain has argued that the gains of the surge mean that I should change my commitment to end the war. But this argume...
I am absolutely convinced that, strategically, it is time for us to bring this war to an end.
The greatest threat to that security lies in the tribal regions of Pakistan where terrorists train and insurgents strike in Afghanistan.
George Bush and John McCain don't have a strategy for success in Iraq; they have a strategy for staying in Iraq.
Presidential candidates Barack Obama and John McCain attacking each other's proposals for dealing with Iraq and keeping Americans safe.
