it completely took them by surprise because there were no signs, no warnings that syed farook and his wife were taking that path. there were absolutely no warnings. it seems like they had a double life or they were really good at hiding their -- you know, what seems to be their new ideology or their intentions. >> we're getting a sense of what that path may have been. breaking news, tashfeen malik pledged allegiance to isis as the attack was under way. now, officials tell us they believe this couple was self-radicalized, maybe social media connections over time. how do we as a society, not just musl muslim-americans, but how do we as american fight back on in