The Spaceflight Now article Sierra Nevada’s Dream Chaser performs critical glide test flight shows the Dreamchaser performing a runway landing using a front skid and two wheels.
The skid extends backwards from the point where it connects to the aircraft. I am guessing that it can turn for steering once in contact with the runway during landing. Are front skids an established method for runway landings? Can they be used to steer by rotating? If so, is there a simple way to understand how this works - how would rotating the skid actually change the direction of the aircraft; how does the frictional force from forward motion produce a lateral force that changes the direction of the aircraft's motion?
Screen shot cropped from Dream Chaser Spacecraft Extended Free Flight
Images (cropped from originals) from here.