We’ve all heard of the No-Fly List. Managed by the FBI’s Terrorist Screening Center, the list bans people on it from boarding commercial aircraft within, into, or out of the United States. The No-Fly List is only one tactic that the U.S. uses in its fight against terrorism, but since its inception there haven’t been any plane-based attacks within U.S. borders. Although the list is certainly not perfect — it has been criticized for profiling and false positives, among other things — its effectiveness makes this type of intelligence-based defense worthy of consideration by all organizations that are regularly targeted by cyberthreats.