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FILE - In this Aug. 16, 2014, file photo, Arkansas guard Brey Cook (74) wears a Riddell SpeedFlex helmet during a preseason NCAA college football practice in Fayetteville, Ark. With lawsuits and concern regarding concussions hanging over every level of football, the race to develop safer helmets and other equipment has never been more intense. (AP Photo/Gareth Patterson, File)