Hi enigma, I shouldn't have stayed away for so long,
but I had alot of reading to do.
Ck. out this manual from an area 51 facility.
Worth the read, then I have tons of other good links.

how do you like my first HTML smiley ?
SECURITY MISSION
TO DETECT, DETER AND DENY UNAUTHORIZED INDIVIDUALS ACCESS TO THIS AREA, MAINTAINING A SECURE ENVIRONMENT AND PRESERVING THE INTEGRITY OF THIS FACILITY. OUR SECURITY VIGILANCE PROTECTS RESOURCES FROM EXPOSURE, COMPROMISE, THEFT OR SABOTAGE.
COVER STORY
YOU ARE A MEMBER OF THE SECURITY FORCE PATROLLING THE NELLIS BOMBING RANGE. [ADVISE PERSONNEL TO DEPART] BECAUSE OF UNEXPLODED ORDINANCE, LOW FLYING AIRCRAFT AND STRAFING RUNS ARE CONDUCTED HERE.
NOTE: TRAINING, GOOD JUDGMENT AND COMMON SENSE MUST BE UTILIZED WHEN EVER YOU ENCOUNTER UNIDENTIFIED INDIVIDUALS OUT ON THE RANGE
!!!!!!more at this link!!!!!!!
http://www.ufomind.com/area51/orgs/security/sec_man/sec_man.shtml