An Egyptian opposition supporter shouts slogans against President Mohammed Morsi during a demonstration on December 18, 2012 in front of the Cairo palace of the Islamist president in a last-ditch bid to scuttle the draft constitution being put to a referendum. Arabic writing on placard reads: "Your constitution is invalid, your regime is illegitimate..." AFP PHOTO/MARCO LONGARI        (Photo credit should read MARCO LONGARI/AFP/Getty Images)