191119-N-KB563-1136 JACKSONVILLE, Fla. (Nov. 19 2019) Master Chief Petty Officer of the Navy (MCPON) Russell Smith speaks to Sailors about mental toughness during a MyNavy HR Career Development Symposium at Naval Air Station Jacksonville. The symposium aims to empower Sailors with the knowledge and tools they need to successfully manage their careers. (U.S. Navy photo by Chief Mass Communication Specialist Michael Russell/Released)