lives, accordingd to the ukrainian government. irika. sargent: holly williams, thank you. an historic, ambitious declaration from the c.e.o. of general motors tonight, the auto giant making plans to spend $35 billion on electric vehicles over the next four years in a quest to overtake tesla as the e.v. world leader. cbs ben tracy spoke with g.m. s mary barra about her road to an electric future. we want to lead in e.v.s, full stop. so that s where we re aggressively moving. reporter: we met up with mary barra at factory zero, g.m. s first assembly plant for zero emissions electric vehicles. this is where they make the electric hummer. so the hummer is no longer a gas guzzler. not at aut a huge truck that costs more than $100,000 is not what most americans want or can afford. so g.m. is now spending $4 billion to overhaul its plant in orion, michigan, to start making