Every four years, DOD reviews the compensation system for the uniformed services of DoD, the Coast Guard, and those commissioned officers in the National Oceanic and Atmospheric Administration (NOAA) and the Public Health Service.  In a memorandum to the Secretary of Defense, President Obama identified four focus areas he would like addressed in this year's review: 1) compensation for service in combat zones, combat operations, hostile fire areas, or exposure to a hostile fire event; 2) Reserve and National Guard compensation; 3) benefits for wounded warriors, caregivers, and survivors; and 4) incentives for critical career fields (mental health professionals, linguists, remotely piloted vehicle operators, and special operations personnel).  The President also directed that other relevant agencies, principally Homeland Security (Coast Guard), Commerce (NOAA), and Health and Human Services (Public Health Service) participate as appropriate.