As Washington ponders Afghan mission, Marines toil in Helmand

By James MackenzieCAMP BASTION, Afghanistan (Reuters) - While Washington works on plans to send more troops to Afghanistan, U.S. forces on the ground are grappling with building an army in the middle of a war their commanders say is locked in stalemate."There are enormous challenges ahead," said Brig. Gen. Roger Turner, who led a task force in Helmand five years ago and who has returned as commander of around 300 Marines training and advising the Afghan army and police.When the Marines left Helm