The White House said on Wednesday that senior members of Iran's Quds force participated in the alleged plot to assassinate the Saudi ambassador in Washington, and that the United States would hold Tehran accountable. "It's clear that senior levels of Quds force were engaged in the plotting," White House spokesman Jay Carney told reporters, saying that Washington would respond by intensifying efforts to isolate Iran. The Quds Force (Persian: نیروی قدس, translit. Niru-ye Qods), (or Qods Force) is a special unit of Iran's Army of the Guardians of the Islamic Revolution (Revolutionary Guard). It has been described as "tasked with...