Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
Tweet: @Varneyco @SheriffClarke I agree. Rioters destroy property, injure citizens, and threaten lives. We need a zero tolerance policy on riots.
This tweet contains emotions: 
anger, disgust