Official websites use .mil
Secure .mil websites use HTTPS
The remains of penetrant left on a speed brake of an F-15E produces a fluorescent color under a black light. The black light allows minute cracks to become visible. (U.S. Air Force photo/Tech. Sgt. Christopher Boitz)
No camera details available.
This photograph is considered public domain and has been cleared for release.
If you would like to republish please give the photographer appropriate credit.
Further, any commercial or non-commercial use of this photograph or any other
DoD image must be made in compliance with guidance found at
which pertains to intellectual property restrictions (e.g., copyright and
trademark, including the use of official emblems, insignia, names and slogans), warnings
regarding use of images of identifiable personnel, appearance of endorsement, and related matters.