Obama: al Qaeda bid to go nuclear is top threat

WASHINGTON (Reuters) – President Barack Obama  said yesterday that efforts by al Qaeda to acquire atomic  weapons posed the biggest security threat, and world leaders  meeting this week must act with urgency to combat this danger. 
 
 Obama, speaking on the eve of an unprecedented 47-nation  summit in Washington aimed at thwarting nuclear terrorism, said  he expected “enormous progress” at the conference toward the  goal of locking down loose nuclear material worldwide. 
 
 “The central focus of this nuclear summit is the fact that  the single biggest threat to US security — both short-term,  medium-term and long-term — would be the possibility of a  terrorist organization obtaining a nuclear weapon,” Obama told  reporters.  

“We know that organizations like al Qaeda are in the process  of trying to secure a nuclear weapon — a weapon of mass  destruction that they have no compunction at using,” Obama said  before talks with South African President Jacob Zuma. 
 
 Nuclear non-proliferation experts say there are no known  instances of terrorist groups obtaining highly enriched uranium  or plutonium that could be used to make a crude nuclear bomb  but note there have been 18 cases of nuclear material being  stolen or going missing since the early 1990s.  

“This is something that could change the security landscape  of this country and around the world for years to come,” Obama  said, warning of the potential consequences if a nuclear bomb  were detonated.  

 Obama’s goal at the two-day summit is to get nations to  agree to secure vulnerable nuclear material within four years  and to take specific steps to crack down on nuclear smuggling.