Please analyze the tweet "#Aleppo city is burning. The head of #terrorism #Assad regime &amp; #Russia are bombarding the city right now with #whitephosphrus #bombs !" and classify its emotional content. Choose from the following emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If no emotions are detected, respond with "neutral or no emotion".
anger, disgust, fear, sadness