Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

MOSUL, IRAQ - OCTOBER 17: Peshmerga forces located at Zardak Mountain attack Deash targets in Bertela region with the Katyusha rocket launchers during an operation to retake Iraq's Mosul from Deash in Iraq on October 17, 2016. A much anticipated Mosul offensive to liberate the city from Daesh began midnight Sunday, according to Iraqi Prime Minister. (Photo by Yunus Keles/Anadolu Agency/Getty Images)
MOSUL, IRAQ - OCTOBER 17: Peshmerga forces located at Zardak Mountain attack Deash targets in Bertela region with the Katyusha rocket launchers during an operation to retake Iraq's Mosul from Deash in Iraq on October 17, 2016. A much anticipated Mosul offensive to liberate the city from Daesh began midnight Sunday, according to Iraqi Prime Minister. (Photo by Yunus Keles/Anadolu Agency/Getty Images)

    JUST WATCHED

    US role in fight to liberate Mosul from ISIS

MUST WATCH

US role in fight to liberate Mosul from ISIS

While US forces are backing up Iraqi fighters battling to liberate Mosul from ISIS, the Pentagon has not said if US troops will enter the city. CNN's Barbara Starr reports.

US role in fight to liberate Mosul from ISIS

While US forces are backing up Iraqi fighters battling to liberate Mosul from ISIS, the Pentagon has not said if US troops will enter the city. CNN's Barbara Starr reports.