Kurdish fighters say US special forces have been fighting Isis for months
On a damp afternoon in Iraqi Kurdistan, a 29-year-old peshmerga fighter named Peshawa pulls out his Samsung Galaxy mobile phone, flicks hurriedly through his library until he finds the video he wants, and presses play.
The clip, filmed just after dawn on 11 September, shows four tall and western-looking men in the heat of a battle against Islamic State militants in northern Iraq. “These are the Americans,” says Peshawa in a secretive tone.
One is crouched behind a machine gun firing round after round from the top of a fortified mound; another lies on his front a few feet away, legs outstretched and taking aim at the enemy with a long rifle. A third wields a long-lens camera taking photo after photo, and the last stands back, apparently overseeing the others during the combat south-west of the city of Kirkuk.