Aviation machinist's mate Petty Officer 3rd Class Anthony Blackner, left, from Jacksonville, Fla., and Aviation machinist's mate Petty Officer 3rd Class Ryan Fingall, from Niceville, Fla., connect an air hose to the engine of an F/A-18C strike fighter before conducting a systems test aboard the Nimitz-class aircraft carrier USS John C. Stennis. Stennis is conducting fleet replacement squadron carrier qualifications off the coast of California.