Ok, so after a recent landing, had a horrible shimmy in the nose wheel, that settled once we slowed way down. Taxied on in, at first afraid of a flat tire. Noticed I had lost rudder input for steering so had to use differential braking to park. On exam, the steering horn was dangling free, and it appears that the bolt between it and the nose-gear frame was gone, and it had snapped off the lug coming from the tubular cross-beam in the top/front of the nose wheel well. My A&P is going to look