Five days into an Iraqi military operation to push ISIS fighters out of Fallujah, residents still inside the city are preparing for a long battle, with some saying they fear being trapped between two forces they don’t fully trust. More than 50,000 people remain in the centre of the Sunni majority city, which has been under control of the extremist group for more than two years. Prime Minister Haider al-Abadi announced the start of the offensive on Sunday.