Sheffi Says 100% Screening of Air Cargo Is `Unrealistic'

Yossi Sheffi, a professor at the Massachusetts Institute of Technology and director of the school's Center for Transportation and Logistics, discusses the outlook for air cargo security following last week's discovery of explosive devices in packages. Greek police detonated a parcel bomb addressed to the French Embassy in Athens today and are investigating at least two more packages, the latest in a spate of mail bombings targeting embassies and European leaders. Sheffi speaks with Mark Crumpton on Bloomberg Television's "Bottom Line."

Watch Yossi Sheffi's interview on "Bottom Line."