also happened at 717 am
that is armstong
those sirens are louder than other sirens
826 am - there are no active FD calls in arlington right now afaik -
so this armstrong unit is going to a call out of town - maybe in
waltham
2nd time today
there has been no need for sirens since the 1970s when 3M invented the
Opticom system - look it up at wikipedia
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