Fragment of the Pentagon facade
This piece of scorched limestone facade was recovered from the wreckage of the Pentagon. Context:
The Pentagon, completed in 1943 under the urgencies of World War II, was built to provide a central headquarters for an expanded U.S. military. On September 11, hijackers crashed an American Airlines Boeing 757 airliner into a portion of the Pentagon that had been reinforced recently as part of a building renovation and counterterrorism effort. The plane crashed just outside the building and slid nearly halfway through it. It totally destroyed a section of the first two floors of the five-story building. The heavily damaged upper floors initially held but, with an intense fire raging, soon collapsed.