The potential upgrade at a U.S. air defense base, within range of missiles in North Korea and China, has residents concerned as Seoul walks a delicate balancing act between the rival powers.
From a golf course in South Korea, the U.S. can now shoot down North Korean missiles. But residents don't want a missile defense system in their backyard — and neither does China.
The THAAD missile defense system will go up in South Korea to help defend against North Korea's missile program. But it's causing a geopolitical tussle.
China has opposed the move, which the U.S. is calling a defensive measure against North Korea. Chinese state-run media warned that THAAD's presence will bring an "arms race in the region."