I think this is 'fear-mongering'
I checked the JBLM website and nothing mentioned about sirens etc.
Dis & misinformation the closer we get.
Below is a list of all of the content posted for Sunday, March 26, 2017. This will be useful for those of you who may have missed something ...
Preparing for your Exchange/Redemption Appointment
Note: Some of the info provided above may be outdated and/or irrelevant.