Mullen's "comfortable about the current security of Pakistan's nuclear weapons..."

AP, here

"I know what we've done over the last three years, specifically, to both invest, assist (Pakistan), and I've watched them improve their security fairly dramatically over the last three years," Mullen said.

Fears that Zardari's government could crumble have tempered but officials said extremist infiltration of the military and intelligence services could compromise the safety of nuclear weapons....

Mullen, meanwhile, cautioned that he remained "gravely concerned" about the Pakistan military's ability to sustain operations inside Pakistan and in the border areas.

"The consequences of their success directly threaten our national interests in the region and our safety here at home," Mullen said...'