Carolina Biological Supply Company in Burlington, N.C., is shown in this Thursday, Feb. 24, 2011, photo. A young college student from Saudi Arabia who studied chemical engineering in Texas purchased explosive chemicals over the Internet as part of a plan to hide bomb materials inside dolls and baby carriages to blow up dams, nuclear plants or the Dallas home of former President George W. Bush, the Justice Department said Thursday. One of the chemical companies, Carolina Biological Supply, reported suspicious purchases by Khalid Ali-M Aldawsari, 20, of Lubbock, Texas, to the FBI on Feb. 1. (AP Photo/Gerry Broome)

Photo by: Gerry Broome

Carolina Biological Supply Company in Burlington, N.C., is shown in this Thursday, Feb. 24, 2011, photo. A young college student from Saudi Arabia who studied chemical engineering in Texas purchased explosive chemicals over the Internet as part of a plan to hide bomb materials inside dolls and baby carriages to blow up dams, nuclear plants or the Dallas home of former President George W. Bush, the Justice Department said Thursday. One of the chemical companies, Carolina Biological Supply, reported suspicious purchases by Khalid Ali-M Aldawsari, 20, of Lubbock, Texas, to the FBI on Feb. 1. (AP Photo/Gerry Broome)