During a working visit to South Korea today, Secretary of Defense Mark Esper pressed the key U.S. ally to foot a larger chunk of its defense bill. Sources say President Trump is demanding a nearly 500 percent increase in funding for 2020. This year, South Korea will pay about $1 billion for the 28,000 U.S. troops stationed there.
Why does it matter? It's likely to further complicate an alliance that's already been shaken by Trump's unconventional attempts to make nice with North Korea.
Read OZY's Flashback about how one small car helped save South Korea.