Poorly secured nuclear material in the former Soviet Union, or secrets from a scientist in Pakistan could help build a bomb that detonates in Paris. The poppies in Afghanistan become the heroin in Berlin. The poverty and violence in Somalia breeds the terror of tomorrow.

The President does not have power under the Constitution to unilaterally authorize a military attack in a situation that does not involve stopping an actual or imminent threat to the nation.

Will not collect a ransom in exchange for not crashing the American economy.

I believe it`s important to be open and honest, especially with your friends.

We've got to identify new strategies to use cleaner energy, because that is a recipe for reducing the overall amount of pollution that's out there.

While we have come a long way since the Stonewall riots in 1969, we still have a lot of work to do. Too often, the issue of LGBT rights is exploited by those seeking to divide us. But at its core, this issue is about who we are as Americans. It's about whether this nation is going to live up to its founding promise of equality by treating all its citizens with dignity and respect.

Our efforts will only be effective if ordinary citizens in other countries have confidence that the United States respects their privacy too. And the leaders of our close friends and allies deserve to know that if I want to learn what they think about an issue, I will pick up the phone and call them, rather than turning to surveillance.