The government is taking numerous security measures in response to the Department of Homeland Security’s so-called elevated terror-threat alert. Surface-to-air missiles are being deployed around Washington, state troopers are authorized to ride New York commuter trains, and Los Angeles International Airport is prohibiting curbside drop-offs or check-ins–requiring passengers to unload at the airport’s parking garages. And the Washington Post is reporting that a small number of foreign flight crews have been questioned in recent weeks after their names appeared to be similar to those on the FBI’s terror watch list. Officials declined to identify the air carriers involved.