Lebanese army tanks secure streets in Beirut, following tense clashes between rival political groups. 12 May 2008

Lebanese army tanks secure streets in Beirut, following tense clashes between rival political groups. 12 May 2008

Lebanese army tanks secure streets in Beirut, following tense clashes between rival political groups. 12 May 2008

Lebanese army tanks secure streets in Beirut, following tense clashes between rival political groups. 12 May 2008

Lebanese army tanks secure streets in Beirut, following tense clashes between rival political groups. 12 May 2008