Three defense contractors from Europe and the Middle East deployed to Washington, DC, their respective 155 mm howitzer variants mounted on trucks for display at a convention center, all hoping to catch the attention of U.S. government officials who are contemplating options for replacing towed cannons that are now deemed vulnerable to counter-battery fire against an advanced adversary such as Russia or China. In addition, two U.S. defense contractors at the same event -- the annual conference of the Association...