Eric Harroun, a U.S. Army veteran from Arizona, was arrested Wednesday for allegedly fighting alongside an Al Qaeda front in Syria, and then boasting about it online. Harroun, who served in the U.S. army from 2000 to 2003, told the FBI in Turkey that he hates al Qaeda and was only trying to help topple the Assad regime in Syria when he fought alongside rebels. He was arrested upon his return to the U.S. The criminal complaint against him claims Harroun "conspired to use a weapon of mass destruction." Harroun remains in custody pending a preliminary hearing in April.