How Russia's war in Ukraine has evolved after one year of fighting

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Up in global tensions over his invasion of Ukraine, Russian president Vladimir Putin has suspended participation in the last remaining nuclear arms pact between the U.S. and Russia. I'm Ben Thomas with the closer look. Putin made the announcement in a bitter state of the nation speech, which he also cast Russia as a victim, and the one fighting for its existence in its war in Ukraine. He noted Russia is not withdrawing from the start nuclear pact, but reaction to the suspension was swift. UN secretary general Antonio Guterres calling on Moscow in Washington to return to dialog immediately, saying a world without nuclear arms control is a far more dangerous and unstable one. NATO secretary general Jens Stoltenberg had this. Over the last years, Russia has violated and walked away from key arms control agreements. With today's decision on new start, the whole arms control architecture has been dismantled. Experts note the move may have limited substantive impact. Professor Ian heard at northwestern university saying start was going to expire anyway, but it does have symbolic importance. Russia is much bolder about using its military to

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