Department of Defense tweet
Breath control.
@USMC
Marines familiarize themselves with breathing through a regulator during helicopter egress training at
@MCB_Hawaii
.
Breath control.@USMC Marines familiarize themselves with breathing through a regulator during helicopter egress training at @MCB_Hawaii. pic.twitter.com/9EyfWlPbjN
— Department of Defense 🇺🇸 (@DeptofDefense) December 8, 2020