Top leader of the Democratic People's Republic of Korea (DPRK) Kim Jong-il (3rd R) visits the Military-First casting foundry of the Ryongsong machinery combination company at an undisclosed location in DPRK, in this undated picture released by DPRK's KCNA news agency in Pyongyang August 4, 2010. KCNA did not state expressly the date when the picture was taken. The Republic of Korea (ROK) staged military drills from Thursday near a tense maritime border with DPRK, the site of the sinking of one of the ROK warships in March. [Agencies]