Security beefed up in Brussels ahead of Asia-Europe Summit

File photo taken in Brussels, capital of Belgium, on Sept. 29, 2010 shows the EU headquarters blocked by fences to prevent the syndicates protest. The U.S. State Department on Oct. 3 issued a travel alert to Americans over potential terrorist attacks in Europe.

Source: http://english.people.com.cn/90001/90783/91321/7157306.html