Related articles:
2006 transatlantic aircraft plot
Color code
United States Department of Homeland Security
Key terms:
actions
affect
al qaeda
alert
alert level
americans
attacks
august
been raised
bombings
citing
credible
elevated
emergency
evidence
flights
flights from the united kingdom
guard
homeland security
homeland security advisory system
homeland security presidential
intelligence
july
kingdom to the united states
orange
raised
reports
ridge
risk
september
severe
specific
states department of homeland security
system
targets
terror alert
terrorist
threat level
united kingdom to the united
united states
united states department of homeland
yellow
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