President Donald Trump wants to renegotiate a free-trade deal with South Korea and have them pay $1 billion for U.S. missile defense. In an interview with Reuters, Trump said South Korea should pay for Terminal High-Altitude Air Defense (THAAD) because it will help protect both of the countries. The two countries have a mutual defense treaty and announced plans to deploy the THAAD system before Trump took office. Despite the alliance, South Korean Defense Minister Han Min-koo said that their country is in no position to pay for the system. "There has been no change in our basic position that the South Korean government provides the site and infrastructure for THAAD ... and the U.S. side shoulders the cost of its deployment, operation and maintenance," the Defense Ministry said in a statement Friday.