Football head injuries: How much can helmets help? | MPR News
Riddell launches Axiom, latest helmet to combat concussions
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N.F.L. to Fine 3 Players for Helmet-to-Helmet Hits - The New York Times
Legacy's football team adopts helmets with air padding
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Seeking to reduce head contact, NFL mandates use of Guardian Cap helmet for early portion of training camp - ESPN
Large Bubble Helmets Are Guardian Caps, NFL's New Safety Measure
Find out how modern football helmets attempt to limit brain injuries | Britannica
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Riddell Adds Head-Injury Analytics to Smart Helmet
Dal's high-tech football helmets can help detect concussions from the sidelines | CBC News
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Helmet Laboratory Testing Performance Results
Xenith Recalls Football Helmets Due to Head Injury Hazard | CPSC.gov
How helmets ward off head injuries - Atlanta Magazine
