PRESIDENT OBAMA: Before I begin, obviously the world is watching reports of a downed passenger jet near the Russia/Ukraine border. And it looks like it may be a terrible tragedy. Right now we're working to determine whether there were American citizens onboard. That is our first priority. And I've directed my national security team to stay in close contact with the Ukrainian government. The United States will offer any assistance we can to help determine what happened and why. And as a country our thoughts and prayers are with all of the families and passengers wherever they call home.