4″ Madcow kit. Olive drab with “US ARMY” decal. Straight launch until about 4000′, then heeled over into the wind (from the SSE) and disappeared. Should have gone to ~ 5500′. Walked the areas North of the flight line both sides of the road past the fence line, and South of the flight line looking for anything that came in ballistic. Grass was short – no evidence. Working theory is that it was snatched by aliens at apogee.