US concerned about Pakistan's stability?

With the deteriorating political situation in Pakistan, US military advisors are becoming concerned about strategic objectives against Islamic militants falling by the wayside. They just had a major meeting on a US aircraft carrier between the Joint Chiefs of Staff, along with Gen. Petraeus, and senior Pakistani military officials. Hopefully we can develop a positive rapport with them that can outlast the changes in their political leadership. The situation in the Afghanistan Pakistan border regions depends upon it.