The Marine was part of Marine Light Attack Helicopter Training Squadron 303, which trains pilots to fly the AH-1Z Viper and UH-1Y Venom helicopters.
Sgt. Colin Arslanbas, "an outstanding Marine and leader," was in a parachute accident during a predeployment certification exercise.
The Navy relieved Cmdr. Cameron Dennis in February, just a few months after he assumed command of the Japan-based warship.
U.S. officials said that they will begin to withdraw troops from Niger but there is no timeline.
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