BAGHDAD (Reuters) - Iraqi President Saddam Hussein said Monday he was not losing any sleep over a possible U.S. invasion of his country. The United States is massing forces in the Gulf for a possible war over Iraq's alleged weapons of mass destruction program. Iraq denies having such weapons. "I can assure you and put your minds at ease that I rarely find it difficult to sleep," Saddam told senior army officers, including his son Qusay, supervisor of the elite Republican Guards. "I fall asleep as soon as I put my head on the pillow. I don't need sleeping pills,...