Don't panic on Tuesday (Dec. 12) if you hear alarms and recorded messages coming from the Navy Yard
: it's a test of "a high-powered alert system to determine decibel levels and whether the system is integrated," reports NBC 4
. UPDATE: Alert DC
says that there will be a test at the Navy Yard on Dec. 14 (Thursday) from 1 to 3:30 pm; another message said there will be tests over the next three days. So, while the specifics are a bit hazy, the main thing is that there will be some noise coming from the Navy Yard in the near future....