Obama takes nuke goal to summit

Focus on threat of terrorists who might acquire ultimate weapon

WASHINGTON - President Barack Obama's pledge to one day rid the world of nuclear weapons runs up against global realities this week when representatives from 47 countries try to craft an agreement on keeping nuclear weapons out of terrorist hands.

Sweeping or even bold new strategies are unlikely to emerge from the two-day gathering that began Monday. But Obama invited the swarm of world leaders as an important step to intensify global focus on one of the most serious nuclear proliferation threats: a world in which non-state actors - like the Al-Qaida terrorist organization - obtain nuclear materials.