Beijing subway begins passenger security checks

A passenger (2nd L) receives security check at the Dongzhimen Subway Station in downtown Beijing, China, June 29, 2008. Beijing subway passengers will face security check at all stations from June 29 to Sept. 20. (Xinhua Photo)

A passenger (R) receives security check at the entrance to the Chongwenmen Subway Station in downtown Beijing, China, June 29, 2008. (Xinhua Photo)

Security guards patrol with dogs at the Dongzhimen Subway Station in downtown Beijing, China, June 29, 2008. (Xinhua Photo)

Passengers receive security check at the Andingmen Subway Station in downtown Beijing, China, June 29, 2008. (Xinhua Photo)

Passengers (2nd, 3rd L) receive security check at a subway station in downtown Beijing, China, June 29, 2008. (Xinhua Photo)