Khalid Ali-M Aldawsari, 20, a citizen of Saudi Arabia and resident of Lubbock, Texas, was arrested late yesterday by FBI agents in Texas on a federal charge of attempted use of a weapon of mass destruction in connection with his alleged purchase of chemicals and equipment necessary to make an improvised explosive device (IED) and his research of potential U.S. targets. The arrest and the criminal complaint, which was unsealed in the Northern District of Texas, were announced by David Kris, Assistant Attorney General for National Security; James T. Jacks, U.S. Attorney for the Northern District of Texas; and Robert...