Us Marines Conduct Polar Icebreaking Drills During Coldweather Training In Setermoen Norway And Fall Intentionally Into Freezing Cold Water 1

hypothermia falling though ice frozen ice cold winter falling polar crawling freeze ice sheet survival frost snow accident snowy river water extreme hole season 2019 u.s. 1080p 2010s fall surface blue through usa dangerous danger drill nature united states exercise army american marines military training landscape white skills