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The government hasn't made changes in the colored alert levels since 2006, despite an uptick in attempted attacks against the U.S. However, the government has changed security protocols since then based on threats. For example, new airport security measures were introduced after an effort to bring down a Detroit-bound jetliner on Christmas Day 2009. "The old Bush color-coded system taught Americans to be scared, not prepared," said Rep. Bennie Thompson, D-Miss., the top Democrat on the House Homeland Security Committee. "Each and every time the threat level was raised, very rarely did the public know the reason, how to proceed, or for how long to be on alert." Under that system, green, at the bottom, signals a low danger of attack; blue signals a general risk; yellow, a significant risk; orange, a high risk, and red, at the top, warns of a severe threat. Since the outset, the nation has never been below the third threat level, yellow
-- an elevated or significant risk of terrorist attack. The use of colors emerged from a desire to clarify the nonspecific threat information that intelligence officials were receiving after the 2001 attacks.
[Associated
Press;
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