不明飞行物：“大多数是晚上出去抽烟的人报告的”
Hansjürgen Köhler 担任 UFO 猎人志愿者已有 50 多年。他将自己的工作视为科学研究，但有时也关心他人。
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来源: DW News
Hansjürgen Köhler has been a volunteer UFO hunter for more than 50 years. He sees his work as scientific investigation, but sometimes also as caring for others.