How good is security at Minneapolis-St. Paul International Airport? There's really no way to know, Minnesota Public Radio reports. Before the attacks of Sept. 11, 2001, reporters and travel organizations would attempt to breach airport security, then publicize their results. But such public reporting ended when the Transportation Security Administration took over, and some experts say it's just as well. "If you really had a transparent rating of the top 430 airports; well if I'm a terrorist I'm going to go after No. 430, whatever that might be," notes Richard Bloom of Embry-Riddle Aeronautical University.

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