june looking ahead at the summer, what worries you the most what s the nightmare scenario well, i think they re still going to pick us apart throughout industry in our critical infrastructures if we don t get on top of this quickly i was thinking back last year to some potential ransomware against voter registration database. and we saw hospitals throughout covid getting locked up. so those are the sorts of things that you could imagine. and that s why it really does need to be treated as a national security threat and needs to stop now. now to the covid pandemic and that grim milestone. the u.s. surpassing 600,000 deaths today by our nbc news tally. but on a more hopeful note new cases are at the lowest level since march 2020 experts credit vaccinations for the turn with over 169 million americans receiving at least one dose now under pressure to help the rest of the world the biden administration is starting global vaccine donations. here s kelly o donnell. reporter: the presid