Several key letters and documents relating to Osama Bin Laden were declassified on Tuesday, out of the huge amount of personal material seized by the United States Navy during the raid on the al Qaeda leader's hideout in Abottabad, Pakistan, in 2011. The US recovered 112 letters from his compound, among them one that expressed his grave fear that a tracking device had been implanted in his wife’s tooth. According to the New York Times, Bin Laden wrote, “The size of the chip is about the length of a grain of wheat and the width of a fine piece of vermicelli”.

Officials said in addition to the letters, they found spreadsheets, books and pornography, but only some of this material has been made public. Several of the letters were written to lieutenants and loved ones, and plans for the expansion of al Qaeda's operations. Among them was also Bin Laden’s will and warnings to several countries, including the US. According to his will, he was worth a fortune dollars – at least $29 million (Rs 196 crore) that is believed to be in Sudan, which he wanted to be used for jihad.