Damage Controlman 2nd Class Milos Sacharzewski, center, explains how to use the Gas Free Engineer kit during a general quarters drill aboard the Nimitz-class aircraft carrier USS Carl Vinson (CVN 70). Carl Vinson is deployed in the U.S. 5th Fleet area of responsibility supporting Operation Inherent Resolve, strike operations in Iraq and Syria as directed, maritime security operations, and theater security cooperation efforts in the region. (U.S. Navy photo by Mass Communication Specialist 2nd Class Nick Brown/Released)