Over the past few days, tens of thousands of people come to the vicinity of Kabul Airport every day. The United States sent about 5,800 soldiers to guard the airport and put in more than 150 military transport aircraft for evacuation. According to the US government, a total of 15,000 Americans and 50,000 to 60,000 Afghans and their relatives who have served the United States need to be evacuated. However, since the Taliban entered Kabul on the 15th of this month, the total number of U.S. troops evacuated from Kabul is only about approximately 25,000 people. Why is the evacuation speed so slow? Is the order so chaotic?