Look US has its own compulsions to support Pakistan because of its fight against Al-Qaeda. Dont tell me India does not have its own compulsions, why does not India help Sri Lanka, simply because political parties in TN are pro-LTTE and will not tolerate any action watsoever against LTTE. Because of this Pakistan and China are increasing their influence in Sri Lanka. Also remember that US never attacked India, but both Pakistan and China did.