TOKYO -- The arrival of a large U.S. nuclear-powered submarine in South Korea last Friday amounts to a "dress rehearsal" for the upcoming visit of a nuclear ballistic missile submarine (SSBN), analysts say.
A converted Ohio-class vessel arrived in South Korean port last Friday

The nuclear-powered submarine USS Michigan approaches a naval base in Busan, South Korea on June 16. (Yonhap via AP)
TOKYO -- The arrival of a large U.S. nuclear-powered submarine in South Korea last Friday amounts to a "dress rehearsal" for the upcoming visit of a nuclear ballistic missile submarine (SSBN), analysts say.