KABUL – U.S. Army General Scott Miller has assumed command of NATO forcesin Afghanistan.Miller, former commander of the U.S. military’s Joint Special OperationsCommand, takes over at a time of mixed hope and fear for the government inKabul.Miller, at a change of command ceremony at the headquarters of the NATO-ledResolute Support mission in Kabul said that to be successful, we mustcontinually learn and adapt to the enemy and the environment.The United States is now a year into its strategy of stepping up pressureon the Taliban by increasing airstrikes and sending thousands more troopsto train and advise Afghan forces, but clear signs of success have so farproved elusive.