materials, are not properly packaged and labeled for air
             transport, they pose significant threats due to the fact that there is
             little room for error should something go wrong in flight (Aviation 2003).
             Air shipments marked undeclared' pose a significant concern for the
             Department of Transportation, fearing the shipped cargo may leak because of
             improper storage or may go undetected through routine inspections (Aviation
             2003). Little is known about the nature and frequency of undeclared
             shipments of dangerous good, since statistically valid data is not
             available and would be difficult to obtain, not only because increased
             inspections would create costly delays for carriers, but also because
             Constitutional protections limit the Department of Transportation's
             inspection authority (Aviation 2003). Such shipments are a constant safety
             concern for the environment as well as human life. DOT is currently
             seeking greater authority to open potentially problematic shipments for
             inspection, but its effects are not "limited to air transport and would not
             enable DOT's Federal Aviation Administration (FAA) to obtain statistically
             valid, generalizable data on the nature and frequency of undeclared air
             shipments" (Aviation 2003). However, a change in the law requiring that
             shippers consent to the opening of shipments for inspection might be
             appropriate for air transport and would enable the FAA to obtain such data
             and identify the resources and actions needed to address the problem
             In March 2004, the United States Government Accounting Office
             summarized the results of previous and ongoing aviation security work,
             "(1) the development of CAPPS II to assist in
             identifying high-risk passengers, (2) the
             management of passenger and baggage
             screening programs, (3) the operations of
             the Federal Air Marshal Service, and
             (4) other a...