“The only arrest so far related to the threats — that of disgraced journalist Juan Thompson — was made because the caller identified themselves multiple times as either Thompson or his girlfriend. The FCC order means JCCs can now see an originating number for every call that comes in, sidestepping the usual restrictions on tracking by carriers — but in most cases, simply getting that number isn’t enough.” The Verge explains why it’s so hard to trace the anonymous bomb threats being phoned into Jewish Community Centers across the country.