Despite authorities disrupting a terrorist plot as recently as May 6, suicide bombers succeeded in attacking three housing compounds used by Westerners and a joint Saudi-U.S. business in Riyadh. Scores were injured and at least 29 killed. The attack came 12 days after the U.S. State Department had warned that “terrorist groups may be in the final phases of planning attacks against U.S. interests” here. The State Department has ordered the departure of all non-emergency personnel and family members, and warns U.S. citizens to defer non-essential travel here.