Turner Broadcasting apologized "for a marketing campaign that sparked Boston's biggest security scare since the September 11, 2001, attacks -- closing bridges, shutting major roads and putting hundreds of police on alert." The "outdoor marketing campaign" promoting an Adult Swim cartoon "had been in place for two to three weeks in Boston, New York, Los Angeles, Chicago, Atlanta, Seattle, Portland, Austin, San Francisco, and Philadelphia." Boston police feared that the magnetic lightboards of cartoon characters might be bombs.