Downloaded from https://www.everyspec.com FM 34-54 5. KEY TERRAIN. a. Predominant terrain. b. Drop zones. c. Landing and Pickup Zones. d. Airfields. e. Critical lines of communications. f. Additional information. 6. MEDICAL CONSIDERATIONS. a. Medical staff and facilities. b. Civilian hospitals. c. Additional information. Figure I-4. Facility Physical Security Checklist (continued). I-13