Determine the emotional tone of the following tweet: "Tiangong 1, China's first space laboratory, will come to a fiery end in late 2017. The average decommissioned satellite either burns ...". Use the provided emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. Respond with the emotions you identify or "neutral or no emotion".
neutral or no emotion