from the united states and around the world. i'm wolf blitzer, you are in the "situation room." tonight, dangerous new losses to isis. a new congressional add min station says the u.s. is failing to stop isis from recruiting u.s. fighters. 250 u.s. citizens have traveled to syria and iraq the past several years to join ul with islamist terrorists. dozens are back in the united states and may be plotting to launch acts of terror. afghan troops battling to retake a key city that's fallen to taliban fighters. the warfare and turmoil may be helping isis gain ground in afghanistan where many americans spilled blood to come pat