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US Vice President Kamala Harris walks with Tanzania's Vice President Philip Mpango upon their arrival at the Julius Nyerere International Airport in Dar es Salaam, Tanzania, on March 31, 2023. (Ericky Boniphace/POOL/AFP via Getty Images)

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The Ohio-class ballistic-missile submarine USS Alaska returns to Naval Submarine Base Kings Bay following routine operations on January 7, 2015. (US Navy photo by Rex Nelson)

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A Ukrainian tank fires during practice on the frontline of the Russia-Ukraine War in Donetsk, Ukraine, on March 29, 2023. (Muhammed Enes Yildirim/Anadolu Agency via Getty Images)

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Russian Navy's diesel-electric Kilo class submarine Rostov-on-Don sails through the Bosphorus Strait on February 13, 2022. (Photo by Ozan Kose/AFP via Getty Images)

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A view from Nakhimov Square as daily life continues in Sevastopol, Crimea, on March 19, 2023. (Vladimir Aleksandrov/Anadolu Agency via Getty Images)

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Father Matthieu Jasseron, priest of Saint Jean-Baptiste de Joigny Parish, records a video at home for his social networks in Joigny, on February 24, 2023. (Arnaud Finistre/AFP via Getty Images)