The US Pak relations have been on a downward spiral. The latest NATO attack that killed Pak soldiers have hightened anti American sentiments. The religious parties have called for Jihad against the US continuance in Pakistan after the 15 day deadline to vacate the Shamsi Air base. Now this could all turn "official" as well. Pakistan worked out a military strategic deal with China to consider an attack on Pak as an attack on China. Pakistan may be emboldened to toughen its stance on the US. Now the US may be a benefactor of Pak but it may well forego it in its quest to keep its "ghairat". China may well prod the Pakistanis to take up Jihad against the US. The Us can flatten Pakistan but then Chinese assistance to the Pakis in terms of money and material to keep the Americans offer down in the region and inflict a lot of damage on the already battered US economy. The Us will be sucked into a Vietnam like conflict that it cannot afford to pull put of and china making sure that the US suffers at the hands of the Pakistanis. China would gain a lot from a US stuck in Pakistan.