Keeping Bombs Off Planes: Securing Air Cargo, Aviation’s Soft Underbelly ReportMay 4, 2007 Keeping Bombs Off Planes: Securing Air Cargo, Aviation’s Soft Underbelly P.J. Crowley and Bruce R. Butterworth release a new report outlining how Congress can make America safer by securing air cargo. May 4, 2007 P.J. Crowley, Bruce R. Butterworth