Former Afghan president calls decision to drop massive U.S. bomb 'treason'

By Mirwais HarooniKABUL (Reuters) - Former Afghan president Hamid Karzai accused his successor on Saturday of committing treason by allowing the U.S. military to drop the largest conventional bomb ever used in combat during an operation against Islamic State militants in Afghanistan.Karzai, who also vowed to "stand against America", retains considerable influence within Afghanistan's majority Pashtun ethnic group, to which President Ashraf Ghani also belongs."How could you permit Americans to bo