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11th Marine Expeditionary Unit
I Marine Expeditionary Force

Mar 11, 2011

Cpl. David M. Hernandez, 11th Marine Expeditionary Unit, uses a burner to activate tear-gas particles in a chamber here March 10 during training in which approximately 100 unit members drilled with XM50 joint-service general purpose masks. Hernandez, 22, from Orange, Calif., is a chemical-biological-radiological-nuclear defense Marine serving with the unit.

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