Obama Outlines Sweeping Goal of Nuclear-Free World

Declaring the future of mankind at stake, President Barack Obama on Sunday said all nations must strive to rid the world of nuclear arms and that the U.S. had a "moral responsibility" to lead because no other country has used one.

On the broader anti-nuclear issue, more than 140 nations have ratified the Comprehensive Test Ban Treaty. But 44 states that possess nuclear technology need to both sign and ratify it before it can take effect and only 35 have do so. The United States is among the holdouts, along with China, Egypt, India, Indonesia, Iran, Israel, North Korea, and Pakistan.