After the 9.11, the United Nations Security Council passed the anti-terrorism resolution, which filled the blank in the existing international law, put every nation under the obligation of not allowing any terrorist activity in the country.

• "9.；11"事件后联合国安理会反恐决议填补了现行国际法的空白；加诸各国不得默许恐怖分子在其境内活动的义务。