Officials say a lighter vest would cut down on overheating issues and reduce back and neck injuries.
A Coast Guard spokesperson says all four crew members were taken to Seattle for treatment following the crash.
The Department of Defense has released the names of five Army soldiers killed in an MH-60 Black Hawk helicopter crash on Friday.
The half-hour mission drained all their ammo and nearly their fuel in one of the most daring rescues of the Vietnam War.
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