perhaps the bomb squad was moving to tactical locations....
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Los Angeles Mayor Antonio Villaraigosa said Los Angeles International Airport was on heightened alert. Police Chief William Bratton said his department had been contacted by Homeland Security and had been informed about an orange terror alert for mass transit.
The Los Angeles Police Department and the county Sheriff's Department established emergency command centers just after 4 a.m. Extra sheriff's deputies were sent to patrol Metrolink commuter stations and trains that serve about 3,700 people daily in the region.
The LAPD's bomb squad was mobilized in case any suspicious packages were found, and police officers were on modified tactical alert, meaning they couldn't end their shifts without permission, police Lt. Paul Vernon said.
http://www.signonsandiego.com/news/state/20050707-0906-ca-britainexplosions-calif..html