A protester wearing a jacket with "No THAAD" letters, participates during a rally to oppose the plan to deploy the Terminal High-Altitude Area Defense system, or THAAD, in front of the Defense Ministry in Seoul, South Korea, Tuesday, March 7, 2017. U.S. missile launchers and other equipment needed to set up a controversial missile defense 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. (AP Photo/Lee Jin-man)