President Bush’s top defense and diplomatic aides were encouraged by the grit of Iraq’s newly elected leader but the Americans’ itinerary on their second day of an unannounced visit underscored the difficulties ahead for U.S. forces and the emerging government. Defense Secretary Donald H. Rumsfeld began his day Thursday with a briefing on the latest programs and technologies to counter increasingly sophisticated roadside bombs that are a prime killer of U.S. forces. Full Story