AP:

LONDON (AP) - British authorities thwarted a terrorist plot to blow up several aircraft mid-flight between the United States and Britain using explosives smuggled in hand luggage, officials said Thursday.

Britain's Home Secretary John Reid said the alleged plot was "significant" and that terrorists aimed to "bring down a number of aircraft through mid-flight explosions, causing a considerable loss of life."

Police arrested a number of people overnight in London after a major covert counterterrorism operation that had lasted several months, but did not immediately say how many.

The U.S. government responded by raising its threat assessment to the highest level for commercial flights from Britain to the United States early Thursday.

We're still at war. They still want to kill us. Someone tell the Democrats. Joe Lieberman understands. Does Ned Lamont?