Tikrit, Iraq, May 20, 2010: Men detained during an April 23 security sweep in Tikrit wait behind concertina wire at an Iraqi police station. The operation, initiated by U.S. troops but carried out by Iraqi soldiers and police, targeted members of a neo-Baathist insurgent group that has proven a persistent, if rarely deadly, foe of U.S. troops across much of northern Iraq.

Check out additional photos as well as the article on the operation here: https://www.stripes.com/migration/u-s-targeting-insurgent-group-in-n-iraq-1.103959