WASHINGTON (AP) - U.S. officials say they have mounting evidence to suggest al-Qaida operative Abu Musab Zarqawi has had a hand in multiple attacks in Iraq, including those on a mosque in Najaf, the U.N. headquarters in Baghdad and Italy's paramilitary police station in Nasiriyah. Another al-Qaida member, Hassan Ghul, was arrested this month while entering northern Iraq and is believed to have met with Zarqawi to plan attacks against U.S. and coalition forces, said a U.S. official, speaking on the condition of anonymity.Now in U.S. custody, Ghul is believed to be cooperating with interrogators. He known as a facilitator...