JACKSONVILLE, Fla. (Feb. 17, 2021) Aircraft mechanic Kerry Mack installs fire shields on the boat tail of an F-5 Tiger II. The boat tail is attached to the aft fuselage and encompasses the engines. The fire shields act as a barrier and heat sink, preventing the heat from the engines from reaching any of the flight control surfaces. (U.S. Navy Photo by Toiete Jackson)