A militant uses a mobile phone to film fellow Islamic State fighters taking part in a military parade along the streets of Syria's Raqqa province on June 30, 2014. (Reuters/Stringer)
A militant uses a mobile phone to film fellow Islamic State fighters taking part in a military parade along the streets of Syria's Raqqa province on June 30, 2014. (Reuters/Stringer)

Broadcasting murder: Militants use media for deadly purpose