NFL players wear Guardian Caps to reduce head trauma during training camp
NFL helmet maker helping curb soldiers' head injuries
NFL helmet maker wants to help curb head injuries of soldiers and Marines
Helmet technology for the football field could help protect soldiers on the battlefield - CBS News
Ukraine war news from February 28: Russian forces bombard Kharkiv, Ukraine holds on to major cities, talks end without ceasefire
Riddell launches Axiom, latest helmet to combat concussions
NFL helmet maker helping curb soldiers' head injuries
NFL hopes to reduce head injuries with helmet experiment – KGET 17