U.S. Raises Air Security Alert To Red

SAN FRANCISCO - AUGUST 11: An air traveller leaves an empty Sephora cosmetics store in the international terminal at San Francisco International Airport August 11, 2006 in San Francisco, California. Businesses at airports are bracing for a financial hit after the Transportation Security Administration imposed a ban on all liquids and gels aboard flights as part of the Department of Homeland Security raising the terrorism threat alert to highest level of 'red' on August 10, for commercial flights from Britain to the United States. (Photo by Justin Sullivan/Getty Images)

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