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Crash test dummy. Head of a child crash test dummy used for vehicle safety testing. The head contains sensors to measure the motions and forces it experiences during an impact. Photographed at part of First Technology Safety Systems in Delft in the Netherlands, which calibrates new dummies, and refurbishes and recalibrates old dummies for the European market. (KEYSTONE/SCIENCE PHOTO LIBRARY/JAMES KING-HOLMES/FTSS)