On Monday October 5, 2015, Amtrak's Vermonter train struck fallen rock and derailed just outside Northfield, VT. The diesel locomotive and several passenger cars tumbled down an embankment. There were many injuries, but thankfully no fatalities. The location is "extremely rural", cut through dense forest, with very limited access.
Within 30 minutes of the call, they had airspace coordinated with the FAA and departed their lab. Upon arrival, they were airborne in 20 minutes and landed 20 minutes later. A KML in the hands of Incident command 20 minutes after that. The incident commander had a 280 image based high resolution KML in his hands within an hour of their arrival! After returning to their lab, they created a ortho mosaics to go along with it.
Outstanding work. Safe, fast, and free!
All of this is available on their blog about the response.