Batman: Legends of the Dark Knight (1989-2007) #106

With Batman still unheard from, the Joker's rampage moves toward a climax that can destroy Gotham City. As the homicidal clown and his allies prepare to strike with an oil-tanker-turned-super-weapon, only Jim Gordon and his thin blue line of Gotham cops stand in the way. 'Duty' part 2.