Look back at the memorable moments in State of the Union addresses through the years.
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2009: 'You Lie!' -- It is a State of the Union address in everything but name when Rep. Joe Wilson interrupts President Barack Obama during a September 2009 speech before Congress. As Obama was saying health care reform would not cover illegal immigrants, Wilson shouts, "You lie!" Amid gasps in the Senate chamber, Obama responds, "That's not true."