US keeps close watch on Pakistan's nukes

The US is watching very closely the security threat posed to Pakistan's nuclear arsenal by militants as also the proliferation threat from those directly engaged in Islamabad's weapons programme, Secretary of State Hillary Clinton has said.
But Washington does not think recent militant attacks in Pakistan including the one on its military headquarters 'pose a threat to the nuclear command and control or access,' she said in an address on non-proliferation issues at the US Institute of Peace think tank Wednesday.
"But we have certainly made our views known and asked a lot of questions and are supporting the Pakistani Government in their courageous efforts against these extremists, which, to us, is one of the most important steps they can take," Hillary said.
Underling Obama administration's concerns about the safety of Pakistan's nuclear weapons and nuclear proliferation through the notorious AQ Khan network, she said, 'those two concerns are part of each and every engagement that we have.'