ISIS’s links to the San Bernardino shooting: what we actually know

Friday morning, multiple news outlets reported some disturbing news: One of the San Bernardino shooters, 27-year-old Tashfeen Malik, apparently pledged allegiance to ISIS in a Facebook post before the shooting.

These reports cite unnamed federal law enforcement officials, so it's important to exercise caution about their veracity at this point. And even if they do turn out to be true, it's important to be cautious about what they mean: The fact that a shooter pledged allegiance to I