Enrique Marquez, who supplied the assault rifles used to kill 14 people in a massacre in San Bernardino, Calif., this month, was arrested Thursday and charged with crimes including conspiring to support terrorists.<br />Court papers show that he and one of the attackers had steeped themselves for years in radical and violent Islamist propaganda, including the teachings of the extremist cleric Anwar al-Awlaki and bomb-making techniques from an Al Qaeda magazine.<br />Mr. Marquez, 24, has told investigators that he and an attacker, his longtime friend and neighbor, Syed Rizwan Farook, had been discussing radical Islam since 2007.<br />They made plans in 2011 and 2012 to launch deadly attacks on the college they had attended and on a busy California freeway.
