Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: 3years today marks the anniversary of that horrid Westgate Attack in Nairobi. My heart out to all those of us who lost our family &amp; friends🕯
This tweet contains emotions: 
fear, pessimism, sadness