The unending influx of migrants has reinvigorated fears that Islamic State fighters could be hiding among the crowds storming Europe's borders. Some reports suggest that thousands of extremists have already been smuggled in. Germany's Federal Intelligence Service chief Gerhard Schindler said that terrorists would rather travel by plane on forged documents than use overcrowded migrant routes. But a former German Deputy Defence Minister Willy Wimmer doesn't quite buy that.<br /><br /><br />RT LIVE http://rt.com/on-air<br /><br />Subscribe to RT! http://www.youtube.com/subscription_center?add_user=RussiaToday<br /><br />Like us on Facebook http://www.facebook.com/RTnews<br />Follow us on Twitter http://twitter.com/RT_com<br />Follow us on Instagram http://instagram.com/rt<br />Follow us on Google+ http://plus.google.com/+RT<br />Listen to us on Soundcloud: https://soundcloud.com/rttv<br /><br />RT (Russia Today) is a global news network broadcasting from Moscow and Washington studios. RT is the first news channel to break the 1 billion YouTube views benchmark.