From the archives, my display back Cossie posed on a thermal re-entry tile removed from Space Shuttle "Columbia" after one of her successful missions. The circled pin hole was made by a testing probe during lab testing post flight. Today the flight article (thermal tile) is preserved in a shadow box frame placed upon my aviation library book case. While contracting with NASA I was quite fortunate to acquire the 'one off" (serial number determines the exact location on the heat shield) tile after the Space Shuttle program was terminated by the obama
administration.https://en.wikipedia.org/wiki/Space_Shu ... a_disaster
