SEOUL, Korea, Republic Of – U.S. missile launchers and other equipment needed to set up a controversial missile defence system have arrived in South Korea, the U.S. and South Korean militaries said Tuesday, a day after North Korea test-launched four ballistic missiles into the ocean near Japan. The plans to deploy the Terminal High-Altitude Area Defence system, or THAAD, by the end of this year have angered not only North Korea, but also China and Russia, which see the system’s powerful radars as a security threat.