Installing radiation detectors at U.S. entry points is taking too long and costing too much, says a congressional watchdog agency whose undercover investigators breached security by slipping nuclear material into the United States.
In a test last year, the small amounts of cesium-137, which is used in industrial gauges, triggered radiation alarms in Texas and Washington state. The material was enough to make two small “dirty bombs,” officials said, yet U.S. customs agents permitted the investigators to enter the United States because they were tricked with counterfeit documents.
