With each new suicide attack on Shiite civilians – the most recent killed 90 last Friday at a mosque run by a leading Shiite party – the United States’ ability to shape Iraq’s political development grows a little weaker and the country’s simmering sectarian strife burns a little hotter. US Ambassador Zalmay Khalilzad’s goal of disarming Iraq’s Shiite militias, say analysts, is becoming increasingly difficult. And Shiite politicians are angrier at the ambassador’s demands they make concessions to Sunni Arabs in order to form a new government. Full Story