World War I. 7th May 1915. An illustration of the sinking of the British ocean liner RMS Lusitania, torpedoed by German U-boat U-20 off the old head of Kinsale, Ireland. [Getty Images]

World War I, 7th May 1915, An illustration of the sinking of the British ocean liner RMS Lusitania, torpedoed by German U-boat U-20 off the old head of Kinsale, Ireland (Photo by Popperfoto via Getty Images/Getty Images)

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