LikeWar author P.W. Singer on how Taylor Swift, Facebook, Trump, and others helped turn us into accidental soldiers in the battles of the future. One weekend in June 2009, Twitter was preparing an upgrade that would take the service offline for a few hours, when the U.S. State Department called. Delay the upgrade, officials at State requested, or risk jeopardizing an important means of political expression during daytime hours in Iran, just days before a presidential election there.