This is a war that both sides are choosing, despite it being in neither US or Iranian interests to fight it, says Marc Champion for Bloomberg Opinion. LONDON: It looks increasingly likely that the United States will go to war with Iran again, and this time it might not just be targeted airstrikes and calibrated responses, but an open-ended conflict with no clearly communicated or readily attainable outcome for either side. For both countries that would be a high-stakes roll of the dice. I’m not