the government has played to that, rather than looking necessarily at some of the faults of its own, its tactic has been to turn around and point finger at the u.s. you invaded pakistan air space to carry out at tack and that has laid bare the cracks in the relationship. at the same time, billions of dollar of aid have flowed here since 2001. in the u.s. there are calls for an end to that. it's a critical relationship, a strategic relationship. very important if the u.s. wants to be able to draw down its troops in afghanistan any time soon. and a relationship right now that has a huge degree of mistrust. zain? >> great perspective from stan grant, thank you so much, reporting from islamabad. the ash cloud that's disrupted air travel in northern europe is dissipating. great news. and the volcano that created the whole thing has stopped erupting.