答案 ， 當然 正如人哋一直同我哋咁講 ︰ 我哋派兵阿富汗 係因為 911 而軍隊仲留喺當地 係因為塔利班對全球嘅安全
The answer, of course, as others have always told us: We sent troops to Afghanistan because of 911 and the troops remained there because of the Taliban's global security