Sources

http://youtu.be/Mtb4mNJnSEk

http://emilms.fema.gov/is906/assets/ocso-bomb_threat_samepage-brochure.pdf

http://www.dhs.gov/ensuring-building-security#4

http://emilms.fema.gov/is906/assets/ocso-bomb_threat_samepage-brochure.pdf

http://www.austintexas.gov/sites/default/files/files/Police/bomb_threat_procedures.pdf

http://chatham.fastcommand.com/getpage.php?name=code_yellow

http://d20inzoloc25ob.cloudfront.net/documents/pdf/EmergencyOperationsPlan2013.pdf

http://www.massey.ac.nz/massey/fms/Health%20and%20Safety/Documents/Emergency%20management/Massey%20Flip%20Plan%202013.pdf?CF341412DFD8312203287FABEC462C0B

http://www.cisco.com/en/US/technologies/collateral/tk869/tk769/white_paper_c11-453495.html