1. All personnel are warned to be on lookout for unauthorized persons in or around aircraft on the field. Crews will make a thorough check of ships before take-offs. Military Police will be notified immediately upon apprehension of any suspicious persons. 2. All ships making emergency landings on the Continent will be searched by crews before taking off for return to base. Small arms will be removed from ship while it is on the ground. By order of Colonel OVERING: