Yahoo News - 8 mins ago - British police thwart aircraft bomb plot
Excerpt:
"LONDON - British police said Thursday they had arrested 21 people in connection with a terror plot against airlines traveling from Britain to the U.S. which was "intended to be mass murder on an unimaginable scale."
"London's Heathrow airport, the busiest airport in Europe, was closed to most European flights Thursday morning after officials raised Britain's national security alert to its highest level — suggesting a terrorist attack may imminent. Huge crowds formed at security barriers."
ARTICLE SNIPPET: "HUGE CROWDS FORMED AT SECURITY BARRIERS" (from post no. 1439)
"We have been very successful in arresting those we were targeting but this is a lengthy operation, and no doubt there will be further developments," Stephenson told reporters outside the headquarters of the Metropolitan police."
Over/under for how soon the NYT can reveal the details of the investigation methods?
Per BBC radio news, arrests were in the south of England, and the Midlands. The English "Security level" system has only been in operation for a few weeks. In theory, "critical" means imminent threat.