For months, Marine leaders in Afghanistan have cited the district of Nawa as an example of what the Marine Corps can accomplish in Helmand province. Home to about 80,000 people along the Helmand River, it has improving security and a stability that is still sorely lacking in other districts. Now, with the traditional Afghan fighting season coming to a close, the Corps is beginning to transfer bases in Nawa to Afghan control, the Washington Post’s Rajiv Chandrasekaran reported yesterday. It’s the first district in Helmand in which it has been possible since a buildup of forces began last December. The move…