Skip to content

Coughing among pilots and fears that contaminants were leaking into their breathing apparatus led the experts to suspect flaws in the oxygen-supply system of the F-22 Raptor. A back-up system is expected to be installed by the end of 2012. (U.S. Navy via Associated Press)

Coughing among pilots and fears that contaminants were leaking into their breathing apparatus led the experts to suspect flaws in the oxygen-supply system of the F-22 Raptor. A back-up system is expected to be installed by the end of 2012. (U.S. Navy via Associated Press)

Featured Photo Galleries