Terrorists had intended practice run within 2 days, using peroxide-based solution

WASHINGTON (AP) - The Bush administration posted an unprecedented code-red alert for passenger flights from England to the United States and banned liquids from all carry-on bags Thursday, clamping down quickly after British authorities disrupted a frightening terror plot.

The heightened restrictions triggered long lines at airports across the country, and governors in at least three states ordered National Guard troops to help provide security.

"This was a well-advanced plan," Homeland Security Secretary Michael Chertoff told reporters as British authorities announced the arrests of 24 alleged plotters.

"In some respects suggestive of an al-Qaida plot." Los Angeles Mayor Antonio Villaraigosa said as many as 10 flights had been targeted, and other officials said the plotters had hoped to bring the planes down in a cascade of horror over the Atlantic Ocean, possibly within days.

(Copyright 2006 by The Associated Press. All Rights Reserved.)