It is highly unfortunate to have any deal with USA. In the past we experienced from Mr.Hentry Kissinger.
The ultimate aim of USA is to rule every country by their command. for which they make welfare, war, diplomacy for making neighbours in hatred relations etc.
Does Pak need further more proof to accept the fact that the terrorists are lodged and trained opening in Pakistan? Also, the recent attacks in Egypt and London adds to the overall proof. It seems that Pakistan only acts when there is a world pressure. It will then capture few scapegoats to prove their commitment. The rest roam freely in the country.