A boy with an Egyptian flag wrapped around himself walks past men waiting in line to vote at a polling station during presidential elections in Cairo May 23, 2012. Protesters threw stones and shoes at Egyptian presidential candidate Shafiq after he cast his ballot on Wednesday, taking aim at the former prime minister for serving under deposed leader Hosni Mubarak. [Photo/Agencies]

Former prime minister and presidential candidate Ahmed Shafiq (L) casts his vote at a polling station in Cairo May 23, 2012. [Photo/Agencies]