At about 07:55 MDT, a Cessna 172I and a Cessna 172N collided during landing at Las Cruces International Airport. The pilot aboard one aircraft and the flight instructor and his student on board the other were not injured. The pilot of one Cessna said the aircraft experienced an electrical failure shortly after takeoff from runway 26. He turned 180 degrees, and entered the downwind to return for landing. Just prior to touching down on the runway, he landed on top of the other Cessna, which was performing touch and go landings.