On December 23, 1999, the FBI reported receiving unsubstantiated information alleging that terrorists planned to mail bombs to addresses in the United States from Frankfurt, Germany. As this same-day news segment for Houston’s KPRC-TV explains, the Postal Inspection Service subsequently began X-ray examinations of all relevant parcels and first-class mail. Don Clark, Special Agent in Charge of Houston's FBI field office, also addresses the potential threat to the area and outlines response preparations during a news conference.