US Marines return to Afghanistan's volatile Helmand

US Marines returned to Afghanistan's volatile Helmand Saturday, where American troops faced heated fighting until NATO's combat mission ended in 2014, as embattled Afghan security forces struggle to beat back the resurgent Taliban.The deployment of some 300 Marines to the poppy-growing southern province came one day after the militants announced the launch of their "spring offensive", and as the Trump administration seeks to craft a new strategy in Afghanistan.