On Oct. 11, the U.S. Department of Justice announced that two men had been charged in New York with taking part in a plot directed by the Iranian Quds Force to kill Saudi Arabia's ambassador to the United States , Adel al-Jubeir, on U.S. soil. Manssor Arbabsiar and Gholam Shakuri face numerous charges, including conspiracy to use a weapon of mass destruction (explosives), conspiracy to commit an act of terrorism transcending national borders and conspiracy to murder a foreign official. Arbabsiar, who was arrested Sept. 29 at John F. Kennedy International Airport in New York, is a U.S. citizen with both Iranian and U.S. passports. Shakuri, who remains at large, allegedly is a senior officer in Iran's Quds Force, a special unit of the Islamic Revolutionary Guard Corps (IRGC) believed to promote military and terrorist activities abroad.