Bill Gertz and Eli Lake
Washington Times 
Thursday, April 15th, 2010
The Obama administration is warning that the danger of a terrorist attack with nuclear weapons is increasing, but U.S. officials say the claim is not based on new intelligence and questioned whether the threat is being overstated.
President Obama said in a speech before the 47-nation Nuclear Security Summit, which concluded Tuesday, that “the risk of a nuclear confrontation between nations has gone down, but the risk of nuclear attack has gone up.”
The two-day meeting concluded with an agreement by participants to take steps to prevent non-state actors like al Qaeda from obtaining nuclear weapons, either through theft of existing weapons or through making their own with pilfered nuclear material.