The Federal Aviation Administration is testing four new methods for finding foreign objects on airplane runways, Matthew Wald of the New York Times reports.  Debris and cast-off airplane parts can get sucked into jet engines during takeoff and landing, causing structural damage or even explosions, such as the explosion that obliterated an Air France Concorde jet in 2000, killing 109 people.  The proposed technologies are from companies in England, Israel, San Diego, CA and Singapore.  Read Wald here.  EH

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