150325-N-BB308-067 MAYPORT, Fla. (Mar. 25, 2015) Master-at-Arms 3rd Class Amber Casterson and her military working dog Raven (R 831} perform a routine bomb search on a vehicle. Military workings dogs are a key component to security at Naval Station Mayport. (U. S. Navy photo by Mass Communication Specialist 1st Class Michael Wiss/Released