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Homeland Security


US Air Travel Alert

Public Alert
Part of UK Foils Transatlantic Bombings

Primary OrganizationUK-US airline bomb plotters
Other OrganizationAl-Qaeda
Warning AgencyDepartment of Homeland Security
Possible Means of AttackSmuggled liquid peroxide explosives
Possible Target(s)Domestic and U.S.-bound overseas commercial airline flights
Area alertedUnited States
Alert issued0800 local, Aug. 10, 20061
Narrative and Notes (Reliable)Following the arrests of suspected terrorists in the United Kingdom in connection with a plot to bomb transatlantic airliners, U.S. Homeland Security Secretary Michael Chertoff announced he was raising the threat level to "red" for U.S.-bound transatlantic flights originating in London and "orange" for all other flights.
It was the first time Homeland Security implemented a "red" level threat, its highest.
The British similarly raised their treat level to "critical."
The plot appeared to involve the use of liquid explosives to be smuggled on board planes; aviation security personnel were confiscating liquids from many air travelers.
Authorities described the plot as close to execution.
The U.S. lowered its UK-oriented threat to "orange" on Aug. 13, matching it with the rest of the threat to airlines.1,2

Sources and Notes

1Press release, Department of Homeland Security, Aug. 10, 2006.
2Press release, Department of Homeland Security, Aug. 13, 2006.

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