Top to bottom: USS Ronald Reagan , USS Theodore Roosevelt , USS Nimitz , USNI News Image Three U.S. carrier strike groups will drill together - in the first tri-carrier operations in a decade - off the Korean peninsula in the Sea of Japan, several sources confirmed to USNI News on Wednesday. USS Ronald Reagan , USS Nimitz and USS Theodore Roosevelt , along with their escorts and air wings, are set to meet off the coast of Korea for four days of exercises later this week.