At a checkpoint outside the northern Iraq town of Makhmur, I saw something I'd never seen before in Iraq.
Two men were checking cars. One was young and wearing a sand-colored uniform of the official Iraqi Kurdish forces, called the peshmerga. The other was older, grizzled and dressed in an olive-green, traditional Kurdish overall, and he's with Turkey's Kurdistan Workers' Party (PKK).
"We're happy to be working together," said the older man, Hajji Hussein Abdulrahman.