There 's no shortage of battle-hardened militants in U.S. , writes Nick Paton-Walsh . Concerns are growing about how ISIS may expand into the country . A senior Afghanistan official fears disaffected Taliban might be attracted to the group .
There 's no shortage of battle-hardened militants in Afghanistan , writes Nick Paton-Walsh . Concerns are growing about how ISIS may expand into the country . A senior U.S. official fears disaffected Taliban might be attracted to the group .