The Terrorist Watch List is managed by the FBI Terrorist Screening Center. The FBI does not publicly confirm or deny any individuals on the Terrorist Watch List. However, "No Fly List" is a subset of the Terrorist Watch List and is overseen by The Transportation Security Administration (TSA). The no-fly list contains names of individuals prohibited from "boarding an aircraft when flying within, to, from, and over the United States." These individuals are part of the federal terrorist watchlist administered by the FBI Terrorist Screening Center.
The Terrorist Watch List and the No-Fly List were created by George W. Bush's administration in 2001 and have continued to be used until this day. There are two types of No-Fly Lists. The second No-Fly List is maintained by individual airlines for unruly passengers. The No-Fly List is different from the Terrorist Watch List, which is a much longer list of people said to be suspected of some involvement with terrorism. Based on Wikipedia, as of June 2014, the Terrorist Watch List is estimated to contain over 2.5 million people whereas the No-Fly list has about 1.8 million.