• This picture provided by the office of Iraq's Prime Minister, shows Iraqi Prime Minister Haider al-Abadi, seated left, wearing a black uniform and flanked by senior military commanders during a meeting at the Fallujah Operation Command center outside Fallujah, Iraq, Monday, May 23, 2016. Iraqi government forces on Monday pushed Islamic State militants out of some agricultural areas outside Fallujah as they launched a military offensive to recapture the city from the extremists, officials said. (Iraqi Prime Minister's Office via AP)

    Iraqi forces battle IS militants outside Fallujah

    BAGHDAD (AP) — Iraq’s prime minister hailed “big successes” Monday by government troops after launching an offensive to retake Fallujah from Islamic State militants, but the operation promises to be one of the toughest challenges yet for the country’s struggling security forces.