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2015年11月11日，中东一处秘密基地，美国空军“全球鹰”无人机完成坚定决心行动第500次任务。（U.S. Airmen assigned to the 380th Expeditionary Aircraft Maintenance Squadron, recover an EQ-4 Global Hawk unmanned aircraft at an undisclosed location in Southwest Asia, Nov. 11, 2015. The EQ-4 Global Hawk nicknamed the ‘Workhorse’ by local maintainers, completed its 500th sortie on Veterans Day.）