Sentence:  On the cable news channels, especially, there were teary-eyed interviews with bystanders; <WSD>alarums</WSD> from both the gun control advocates on the one side and the Second Amendment nuts on the other; and--inevitably, inappropriately--debates over what the shooting might mean for this closely-watched Senate race. 
Meaning of the word marked with <WSD> tags:  A call to arms.