In a downtown Manhattan courtroom on Monday, lawyers for the US Justice Department and 40 state and district attorneys general warned a jury that the concert industry was being squeezed by a monopolist: Live Nation-Tickemaster. After amassing dominance over ticketing and artists’ use of large amphitheaters, lead DOJ counsel David Dahlquist alleged, Live Nation constructed a “flywheel” of power that forced venue customers to stay within its ecosystem. It threatened or retaliated against them