AMMAN, Jordan (Reuters) - Jordanian state television aired Monday what it said were confessions by captured militants tied to al Qaeda who said they had planned deadly chemical attacks that could have killed thousands of people. Authorities had already reported the plot earlier this month, but the confessions shown on a prime-time broadcast provided further details of the planned attacks. The arrested militants, who included Syrians, said they were ordered by Abu Musab al-Zarqawi, accused by Washington of being a top al Qaeda supporter, to attack targets that included the heavily fortified U.S. embassy and intelligence headquarters. The head of...