TEHRAN, Iran (AP) -- Hundreds of thousands of mourners began a dayslong funeral on Saturday for Iran's Supreme Leader Ayatollah Ali Khamenei, beating their chests in sorrow before the glass case containing his flag-draped coffin in Tehran and calling for revenge against Israel and the United States. The funeral for Khamenei, who ruled Iran for decades before he was killed at age 86 in a Feb. 28 airstrike in the opening moments of the Iran war, could provide a boost for the country's theocracy an