The newer detectors forgo wires and gas in favor of highly engineered crystals made from sodium iodide or cesium iodide.

FORBES: Stopping porta-nukes

Berkeley's chief rival, SAIC in San Diego, has sold hundreds of its cesium iodide handheld screeners to the FBI and other agencies.

FORBES: Stopping porta-nukes

Berkeley's chief rival, SAIC Corp. in San Diego, has sold hundreds of its cesium iodide handheld screeners to the FBI and other agencies.

FORBES: Stopping Porta-Nukes