You may not have noticed because most of the plots were foiled, but 2009 saw an unprecedented surge in terror "events" on U.S. soil. When analysts tally these events, they refer to anything from a disrupted plot to U.S. citizens traveling abroad to seek terror training or a lone gunman running amok in the U.S. And by the calculations of Rand Corporation expert Brian Jenkins, more terrorist threats were uncovered in the U.S. during 2009 than in any year since 2001.