Two YF-12 were flown to Eglin AFB in Florida for firing trials. On the same day JimEastham fired an unarmed AIM-47 against a QB-47 flying 60,000 feet below. The missile passed throughthe QB-47s horizontal stabilizer. The YF-12s scored an impressive 6 hits out of 7 attempts. The single miss was attributed to missile gyro defects.