a good sunday evening to you. i'm jim sciutto, and this is cnn's special live coverage of the extraordinary events this weekend out of russia. moscow's red square blocked off again today after the brief but stunning insurrection that's gripped the world, could perhaps weaken vladimir putin's grip on his country. we should note it's far too soon to know. so much we don't know about what led wagner mercenary group leader yevgeny prigozhin to launch a march on moscow and what convinced him to abruptly call it off. and then, it's said, go into exile. u.s. secretary of state tony blinken today called the whole series of events extraordinary, believes it indicates that cracks are emerging in putin's