ISLAMABAD (Reuters) - The head of Pakistan's powerful spy agency headed for Washington on Wednesday for unscheduled talks, the military said, days after the United States suspended a third of military aid over deepening tensions in their relationship. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=32y7SalSAus:qaI1p1QGOpI:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=32y7SalSAus:qaI1p1QGOpI:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/32y7SalSAus)