New York senator and former first lady Hillary Clinton has thrown her hat into the presidential ring. In her first public appearance since joining the 2008 White House race Clinton said Sunday she wants to become president because she is "worried about the future of our country."

Hillary Clinton thinks that in the increasingly crowded field of potential presidential candidates, she's the one who can best confront the nation's challenges.

"I am worried about the future of our country and I want to help put it back on the right course, and I believe that I am best positioned to be able to do that," Clinton said.