WASHINGTON - US intelligence experts say that a picture of Osama bin Laden emerging from items seized at his Pakistani compound indicates he was fixated on attacking America. This preoccupation with attacking the United States -- even while ensconced in a House in Abbottabad from where the al-Qaeda leader operated like a crime boss issuing instructions -- set off frictions with his followers, intelligence officials told The Washington Post. The officials, studying and probing the huge cache of materials recovered from the compound, said the items contain handwritten journals, long-winded compositions on computer hard drives, piles of paper documents, flash drives and laptops. Bin Laden was killed in a raid by a US Navy SEALs team in a May 2 predawn raid on his compound in the garrison town of Abbottabad, northeast of Pakistan's capital, Islamabad.