March 14 (UPI) -- North Korea launched 10 ballistic missiles into the sea on Saturday -- which landed just outside Japan's economic zone in the East Sea -- in a show of force amid a U.S.-South Korea military exercise. The launch, confirmed by the Japanese and South Korean defense ministries, is one of the largest North Korea shows of force that it has ever launched, The Japan Times and The Independent reported. The missiles were launched from the west coast of North Korea, flying roughly 211