How significant is the US-South Korea relationship?

(NewsNation) — Presidents Joe Biden of the United States and Yoon Suk Yeol of South Korea on Wednesday will sign an agreement to have U.S. nuclear-armed submarines docked in the Asian country for the first time in 40 years.

This is Biden's third bilateral meeting with Yoon, and it comes at a moment of heightened anxiety for both leaders over an increased pace of ballistic missile tests by North Korea over the last several months.

Congressional researchers wrote in a report that Yoon is hoping to transform South Korea into a "global pivotal state" by becoming a more ac...