When a CSX freight train carrrying hazardous chemicals derailed in the century-old Howard Street Tunnel on July 18, 2001, the resulting underground fire and water main break closed down much of downtown for almost a week and brought East Coast freight traffic to a halt. For many Baltimoreans it was the first they'd heard of the tunnel, but it was a reminder to the industry and national transportation officials that Baltimore is a dangerous bottleneck in the nation's freight rail system. Amazingly, no one was injured in what could have been a serious disaster. Two months later, four jetliners were hijacked on 9/11 and the memories of the Howard Street debacle quickly receded. As the decade ends, little progress has been made toward replacing the tunnel.