"I'm trying to be the one belly button for people who are frustrated, to help them out," said the commander of the PCS Joint Task Force.
Marine Cpl. Kyle Carpenter saved another Marine's life in 2010 in Afghanistan when he jumped in front of a grenade to absorb the blast.
The exercise extended communications, reconnaissance and targeting across wide swaths of the Pacific region.
Deteriorating weather conditions were likely a factor in the Marines going missing, the Marine Corps said.
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