Task: Analyze the tweet's sentiment and assign it to either 'neutral or no emotion' or one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: As I remember and reflect on Reginald Denny on a night much like this (like #Charlotte) I think to myself, the gun lobby must be rejoicing.
This tweet contains emotions: 
joy