alexei navalny, was sentenced to another nine years in prison. jericka. >> duncan: holly williams for us in ukraine. thank you. from the war in ukraine to the threats here at home, the biden administration is sounding the alarm of possible cyber attacks from russia targeting the nation's financial sector, power grids, and water systems. for more on that let's turn to cbs' major garrett at the white house. >> reporter: f.b.i. director christopher wray said today russia appears to be preparing to launch cyber attack in addition the u.s. >> most cyber attacks don't just happen in an instant. there's activity that leads up to it. there's scanning and researching, researching of vicims, scanning for vulner acts in systems. there's a whole range of preparatory work, which is what we've been seeing. >> reporter: a march 18 f.b.i. bulletin obtained by cbs warned at least 23 u.s. companies that 140 russian-linked i.p. addresses were scanning networks