For what seems like the millionth time, I am in favor of non-intrusive screening for EVERYONE, Americans, Canadians, British, French, Spanish, Muslims, Jews, Hindus, Sikhs, etc. TSA and DHS should spearhead development of technology that can quickly detect actual threats to airliners, specifically explosives and firearms. The WTMD takes care of firearms, and puffer-type machines should prevent the introduction of completed explosives.

However, Americans should not be subject to more intrusive screening, such as secondary screening, i.e. patdowns, searches of bags, etc., unless traditional Fourth Amendment requirements, i.e. reasonable suspicion of involvement in criminal activity, are satisfied. Statistics can be bandied about all day, but the simple common sense facts show that Islamic fanatics who are overwhelmingly male and young are the terrorist threats today. BTW, check this link regarding the Jordanian government denying that one of the suicide bombers was a woman. http://www.msnbc.msn.com/id/9979747/

Given that our resources for screening are limited, doesn't it make sense to concentrate those resources on individuals, such as those from Indonesia, Saudi Arabia, Yemen, etc., who are members of the groups that are the perpetrators of terrorism? Again, all passengers must be screened, but the intrusive measures that take more time and hence cost more money should be reserved for those passengers who alarm the baseline screening methods and those who are suspicious.