The flak artillery units rapidly take their position during the military exercise in Jinan, capital city of East China’s Shandong province, Aug 3, 2010. A five-day air defense drill started in Jinan on August 3, involving a 100 aircraft of seven different models and 12,000 soldiers. The practice launched by the Jinan Military Area Command focused on six main items including emergency evacuation, information countermeasures and anti-aircraft artillery protection. The drill is aimed at ensuring preparedness for the defense of Beijing in a potential air raid. [Photo/Xinhua]