Ever wonder whether the U.S. government considers you a terrorist? You may never know, but there may be more of you out there than first thought.

American air travelers touched off silent terrorist warning alarms nearly 20,000 times in 2006 by having names match against the government's master terrorist watch list, according to Wired.com. The Web site cites a statistic on a buried document at the Department of Justice.

The number is significant in that it represents a 27 percent jump from 2005, and shows growth in a joint FBI and Department of Homeland Security operation called the federal Terrorist Screening Center, or the master list already mentioned.

The list reportedly includes 500,000 names.

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