shocking attack. ukraine repelling intense russian attacks on the capital. plus, the new cia video urging russians to share war secrets the future of ai the ceo behind chatgpt describing his worst fears, calling for regulation of the tech he helped create plus, our exclusive with the ceo of microsoft. and the play at the plate. when a dust devil starts suddenly, a teenaged umpire has the save of the day. announcer: this is nbc nightly news with lester holt good evening, and welcome, everyone. with the clock ticking down to america defaulting on its debt, some potentially positive signs tonight following a white house sit-down between president biden and congressional leaders. republicans and democrats are at loggerheads over raising the debt ceiling and allowing the country to continue paying its bills. underscoring the urgency of the moment, the white house says president biden is cutting short his planned trip to the asia-pacific region in order to deal with the