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The original was posted on /r/todayilearned by /u/Hoihe on 2024-06-18 14:18:54+00:00.

Original Title: TIL that in the early 2000s, a US nuclear submarine, “Greenville” had catastropically collided with a japanse high school training vessel. During a VIP demonstration voyage, after performing an emergency surfacing - the submarine sliced the training vessel in half.