A man holds a placard during a demonstration against the regime of Syrian president Bashar al-Assad outside the Syrian embassy in central London on October 29, 2011. UN chief Ban Ki-moon urged Syria "immediately" to end attacks on civilians, a day after dozens of people were killed in a fierce *****down on dissent and 17 troops died in clashes with suspected army deserters. AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images) 2011 AFP