No, practiced all of the procedures constantly, but never had an actual keyturn (obviously). I thought I was close twice. I was on alert (Minuteman) both times the Norad computers put out false inbound indications.
When I was taking a class on military aviation history, we discussed those two NORAD incidents @ length. It's amazing how a simple computer error could have been so dangerous. Thankfully we had enough safeguards in place to stop the situation from getting out of hand.