Tweets and online videos are emerging as weapons of war in the Islamic State’s campaign to seize a swath of Iraq, with the al-Qaeda offshoot’s use of social media dwarfing efforts by other militant groups.
Over the weekend, websites previously used by the Islamic State featured a video purporting to show its leader, Abu Bakr Al-Baghdadi, delivering a sermon in the captured city of Mosul. Two weeks ago, an audio recording posted online proclaimed a caliphate across the territory it holds in Iraq and Syria.
