To U.S. Navy SEAL FOUNDATION: SECURITY FUNDRAISING NEEDED FOR PHILLY NAVAL YARD:

Threat leads to evacuation of Philly naval yard
http://www.cnn.com//2015/06/16/politics/naval-station-philadelphia/index.html

When the terrorists falsely call in threats, they observe what people and what locations get the most protection. Here, they now know where, how and who they will want kidnapped from those bases. It's important that only retinally-scanned individuals get to access classified locations.