Passengers endure alert in high spirits

Delayed passengers waited good-naturedly Thursday in orderly lines snaking through Baltimore/Washington International Thurgood Marshall Airport as aviation officials bolstered security measures under federal orders.

Just hours after London authorities thwarted alleged terrorist attacks planned for U.S.-bound planes, and federal officials issued the first code red security alert for flights inbound from Britain, many Baltimore travelers said long waits through security were well worth it.