What causes someone to go on the U.S. government's watch list?

Individuals may be listed on the United States' government watch list if they participate in a terrorist act or do something that raises suspicion. The government usually keeps its watch list private to avoid tipping off a potential terrorist.

Individuals may be listed on the U.S. watch list if they speak or write content that suggests terrorist intent, including on social media websites or videos.

Individuals who have close relationships with known terrorists or those who raise any form of suspicion through their behavior or work may also be on the watch list. Once individuals are on the watch list, there is no legal procedure to reverse their status because inclusion is not typically disclosed.