Sorry to break the first rule of Fight Club...
Experts and government officials say they can't track hundreds of Europeans returning after fighting alongside ISIS in Syria, Iraq, and Libya in recent years.
Twitter and Instagram reveal the mundane side of life as a jihadi.
There's nothing more obnoxious than a fighter slapping his own face and screaming. Which is why this is awesome.
A Nazi-fighting, whiskey-drinking, cigar-smoking Polish artillery gunner. Who was also a bear!