Armed forces from the US and other Western nations are facing a new threat in Iraq.
American airbases have come under attack from Iranian-made drones carrying explosives.
Iran denies involvement but its proxies in Iraq, the Shia militia, have been growing in strength.
What is in effect a shadow war is taking place between the US and Iran, with Iraq as the battleground.
Huw Edwards presents BBC News at Ten reporting by Quentin Sommerville.
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