No Fly List

The No Fly List is a list, created and maintained by the United States government's Terrorist Screening Center (TSC), of people who are prohibited from boarding a commercial aircraft for travel in or out of the United States. The list has also been used to divert aircraft, not flying to or from the U.S, away from U.S. airspace. The number of people on the list rises and falls according to threat and intelligence reporting. There were 10,000 names on the list in 2011, 21,000 in 2012, and 47,000 in 2013.