Drone airplane that attaches to walls

Stanford University's Biomimetics Laboratory has developed a drone which is able to cling on walls and stay fixed. The airplane clings on walls thanks to small spines on its front feet. The main difficulty with this technology is being in a position to be able to make the plane land on a vertical surface at the right time and angle without falling. The drone can stay in place for days and even resists winds. Its mission is to gather information on buildings and observe/film strategic places. When it stays in place vertically the robot consumes practically no energy and in particular makes no noise. When it has to leave the wall, the airplane quickly moves away then resumes its flight. Very impressive. http://www.youtube.com/watch?v=AYf5gUN4Ufs via bj