Supporters of ousted President Mohamed Morsi clash with Egyptian riot police on a street leading to Rabaa al-Adawiya square in Cairo on August 14, 2013 as security forces backed by bulldozers moved in on two huge pro-Morsi protest camps, launching a long-threatened crackdown that left dozens dead. The operation began shortly after dawn when security forces surrounded the sprawling Rabaa al-Adawiya camp in east Cairo and a similar one at Al-Nahda square, in the centre of the capital. Photo by Ahmed Asad