Boeing has completed an agreement to plead guilty to criminal conspiracy in connection with two fatal crashes of its 737 Max jetliner, setting the stage for a possible courtroom confrontation with relatives of those who were killed. Details of the plea deal were disclosed Wednesday in a federal court filing after weeks of talks between Boeing and the US Justice Department, which first disclosed the agreement earlier this month. The case reflects efforts by the Biden Administration to balance new punishments for a reeling titan of US industry with demands by grieving families for retribution.