U.S. Coast Guard Petty Officer 1st Class Tobias Perio instructs Port Security Unit 312 personnel while at the range during the unit’s deployment to Port Hueneme, California, in support of the Department of Defense-led Pacific Blitz 2019 exercise, March 7, 2019. Personnel assigned to Port Security Units are trained in port security and harbor defense, theater security cooperation, coastal sea control operations, rotary-wing air intercept operations, combating terrorism, environmental response, and Maritime Operational Threat Response support. U.S. Coast Guard photo by Petty Officer 1st Class Matthew S. Masaschi