** FILE ** In this April, 15 1995 file photo, Bosnian Serb Leader Radovan Karadzic, left, and Bosnian Serb Army commander General Ratko Mladic, right, listen during a Bosnian Serb assembly session in the western Bosnian town of Sanski Most some 80 kms (50 miles) west of Banja Luka. The office of Serbian president says former Bosnian Serb leader Radovan Karadzic has been arrested in Serbia. President Boris Tadic's office says in a statement that Karadzic was arrested on Monday July 21, 2008 evening "in an action by the Serbian security services." (AP Photo/Sava Radovanovic, File)