Pakistani Taliban chief Hakimullah Mehsud has written a letter to the sister of Aafia Siddiqui, a Pakistani convicted for attempted murder by an American court, promising to carry out a 'memorable attack against the United States".The Tehrik-e-Taliban Pakistan chief "threatened a memorable response against the United States" in the letter he wrote to Fouzia Siddiqui nearly two months ago, Dawn News channel reported.
