The #46-062 <a href="//commons.wikimedia.org/wiki/Bell_X-1" title="Bell X-1">Bell X-1</a> rocket-powered experimental aircraft (known for becoming the first piloted aircraft to fly faster than Mach 1, or the speed of sound, on October 14, 1947) photographed during a test flight.
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<a href="//commons.wikimedia.org/wiki/NASA" title="NASA">NASA</a></div>
<a rel="nofollow" class="external text" href="http://www.nasa.gov/centers/langley/multimedia/iotw-bellx1-dfrc.html">NASA Langley Research Center website</a>