Germany 's Deso Dogg converted to Islam , taped propaganda for al Qaeda . Peter Bergen : Jihadists have shifted focus from Afghanistan-Pakistan to Syria . Videos by German militants training with groups associated with al Qaeda during 2009 and 2010 were invariably taped in the Afghanistan-Pakistan border region . He says the influx of foreign fighters into Syria worries terrorism experts . Bergen : The U.S. has been bombing ISIS in Iraq and Syria, but it is unclear if that will be enough to defeat them.
Germany 's Deso Dogg converted to Islam , taped propaganda for al Qaeda . Peter Bergen : Jihadists have shifted focus from Afghanistan-Pakistan to Syria . He says the influx of foreign fighters into Syria worries terrorism experts . Bergen : The U.S. has been bombing ISIS in Iraq and Syria, but it is unclear if that will be enough to defeat them.