Destruction of Building 641, NASA Langley.  This building housed the Eight-Foot High Speed Wind Tunnel, a National Historic Landmark.
NASA Langley
2011
NASA Langley, via National Park Service: <a rel="nofollow" class="external free" href="http://www.nps.gov/nhl/Fall2013Nominations/EightFootHighSpeedTunnel.pdf">http://www.nps.gov/nhl/Fall2013Nominations/EightFootHighSpeedTunnel.pdf</a>