Life aboard Pre-Commissioning Unit Colorado (SSN 788) Underway (3)

ATLANTIC OCEAN (Jan. 12, 2018) Sailors assigned to Pre-Commissioning Unit Colorado (SSN 788) dive the boat and participate in a fire drill. Colorado is the 15th Virginia-class attack submarine and is scheduled to be commissioned March 17, 2018. (U.S. Navy video/Released)

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They would have died of smoke inhalation were it a real casualty.