Pipe bomb scare raises new questions about mail safety

NEW YORK (AP) — The wave of pipe bombs addressed to prominent Democrats has raised fresh questions about the ability of the U.S. Postal Service and private delivery companies to intercept explosives and other dangerous items.
Biohazard detection, X-rays and other technologies have had some notable successes in recent years, but officials warn that the sheer volume of mail makes it impossible to catch everything.
David Chipman, a retired agent with the Bureau of Alcohol, Tobacco, Firearms a