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