A US Predator drone flies above Kandahar Air Field, southern Afghanistan, on 31 January.

一架美国捕食者无人机于1月31日飞过阿富汗南部的坎大哈机场上空。

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On May,22 they even launched a ground attack on Kandahar air field, NATO's sprawling military base outside the city.

VOA: standard.2010.05.26

One can get a sense of how important this air corridor is from the fact that Kandahar Air Field near the Pakistan border in southern Afghanistan is reported to have the busiest runway in the world with some 700 flights landing or taking off there every day.

CNN: What's working in Pakistan

The flights taking the detainees from Afghanistan to Guantanamo won't be nonstop, military sources said Wednesday, because the air field at Kandahar where the detainees are being kept cannot handle a big Air Force transport.

CNN: U.S. may sedate Afghan detainees during flights