Investigators find security lapses at U.S. ports of entry

WASHINGTON – Undercover investigators slipped a radioactive substance – enough, they say, to make two dirty bombs – across northern and southern U.S. borders last year in a test of security at American ports of entry. Radiation detection equipment at the unidentified sites went off, but the investigators were permitted to enter the United States after using counterfeit documents to deceive customs agents. Read more...