A New York Times article (Page 1, Nov 2,2010) describes plans by the US administration to demand potentially 100 % screening of air cargo.  But the question is whether such screening should apply to the 80 % of air cargo that are exchanged between customers with long term business relationships.  But this air cargo moves on airplanes that sometimes also carry passengers.  Would segmented screening standards make the most sense ? Or will the delays associated with the 100 % screening be worth the reduced risk ?