>> then i remember telling my colleagues, i think we need to go into lockdown. >> inside house speaker pelosi's office, her staffers rush to a conference room, lock the door. among them, alisa la and kelsey smith speaking exclusively to cnn. >> then we started hearing the banging and, like, the hooting and the hollering. >> nancy! >> very close to us. then i realize, okay, music off. everybody silence your cell phones. turn the lights off. do not say anything. >> we're coming for you, nancy! >> it was menacing. >> can i speak to pelosi? >> they were like, where's nancy? where's nancy? where are the people that work for her? >> we're going to find you. >> yeah. >> they had barricaded themselves in hoping the door would hold. >> the din was coming from all directions, and we heard somebody yell, i found nancy pelosi's office.