Maryland Transportation Authority Police resumed checking all vehicles entering Baltimore-Washington International Airport for nearly four hours yesterday - a tactic that has been employed sporadically and that authorities said was not prompted by a specific threat.
The searches began at 2 p.m. and ended about 5:45 p.m., said a police spokesman, Cpl. Gregory Prioleau. More than 1,700 vehicles were stopped, producing a traffic backup of "a little more than half a mile," he said.
Officers checked the interiors and trunks of each vehicle, and used mirrors to look underneath them, he said.
Prioleau said the decision to conduct the "100 percent checks" was not related to a news conference on security initiatives at BWI scheduled to be held at the airport today with Maryland's homeland security and transportation chiefs.