JLA, book 13 : Rules of Engagement
Joe Kelly, Doug Mahnke et Duncan Rouleau2004

In the thought-provoking JLA: RULES OF ENGAGEMENT, Batman, Superman, Wonder Woman, the Flash, Green Lantern and the rest of the JLA find themselves caught in a moral dilemma as they intercept the signal of an alien race threatening to invade a neighboring planet. Conflicted between their rights and duties to interfere in galactic conflicts and politics, the team discovers that any decision that they make will lead to dire consequences. Following this adventure, the JLA then returns to Earth and becomes involved in a deadly confrontation that results in the death of a thousand people. Racked with guilt and wanted by the U.S. government, the JLA must quickly determine if they are being framed or if they are truly guilty of mass homicide.
(Collects JLA #77-82)