Pak is very important for the us:
Despite trust deficit in bilateral ties, Pakistan is very important state for the US due its nuclear weapons and the importance of its stability in the region, Defence Secretary Robert Gates has said.
The top US diplomat in Kabul warned on Wednesday that Pakistan posed a bigger security challenge to America and the world than Afghanistan, as Islamabad grappled with the latest terrorist attack on its soil and the escalating Taliban insurgency on its north-western border.