Satellite imagery spotted a Chinese submarine with its nuclear ballistic missile hatches open while pier-side at a naval base with underground facilities facing the contested South China Sea.
At the Wisconsin Maritime Museum in Manitowoc, you can descend a steep staircase into the USS Cobia, a US Navy submarine that sank 13 ships and earned four battle stars in World War II.
In addition to anti-submarine drills, the three countries will practice humanitarian search-and-rescue operations, including saving people who fall into the water and treating emergency patients.
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