WASHINGTON, March 19, 2010 – The Marja operation has served as proof of principle for operations in Afghanistan, and commanders are working to adopt the principles in other areas in the country, a senior military official said here today. The official, speaking on background, said that although much remains to be done, operations in Afghanistan’s Helmand province have proved that the counterinsurgency strategy does work. Still, actions in the region are in the early stages. Clear, hold, build and transfer are the steps in the strategy, the official said, and operations in the region are still in the hold and...