Police and their bomb-sniffing dogs responded to a phoned-in threat Thursday at Los Angeles International Airport.
Airport spokesman Marshall Lowe says the response turned up no bomb and Tom Bradley International Terminal was cleared after about an hour.
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Vehicle traffic was temporarily diverted from the terminal's upper-level road.
The threat came at noon, several hours before President Barack Obama was scheduled to fly out of the airport.
A spokeswoman for the FBI says federal officials are trying to determine who called in the threat.