90129-N-PE825-0015 GULFPORT, Mississippi (Jan. 29, 2019) Naval Aircrewman 2nd Class David Rivera, right, prepares to have his blood drawn by Hospital Corpsman 2nd Class Bree Alvarado while processing through Expeditionary Combat Readiness Center (ECRC). ECRC is conducting a remote mobilization at Naval Construction Battalion Center Gulfport, Mississippi, away from their headquarters location in Norfolk, Virginia; testing their ability to mobilize Sailors from various locations throughout the United States. U.S. Navy photo by Mass Communication Specialist 1st Class Collin Turner/Released)