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What is an attenuator? Penske penalized by IndyCar in Indy 500 cheating scandal for altering

INDIANAPOLIS — IndyCar hit Team Penske with major penalties after it altered the attenuator on the cars of Josef Newgarden and Will Power for Indy 500 qualifying this weekend. IndyCar moved Newgarden ...
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An attenuator truck may have saved lives in crash on I-75. What is it?

One person is dead and multiple others are injured after a semi-truck slammed into a Michigan Department of Transportation worksite Tuesday morning. The crash caused traffic on I-75 North near I-275 ...