here in our country but it could be the dominant source of infection later on this summer. arthel. arthel: eric, americans across the nation today celebrating juneteenth, marking the freeing of slaves in texas two years after the civil war ended. many states had already adopted the holiday over the years but president biden signed a bill thursday making it an official federal holiday. let's go aishah hasnie, she is live in harlem with more of the celebrations. happy juneteenth, aishah. >> reporter: happy juneteenth to you, arthel. nim a big block party in historic harlem. via surprise for you. i met beautiful young ladies here and we're going to put on a show for you. this is the the a-stars dance group from harlem here. these girls, 8-16 years old, and they're going to give us a little performance. go ahead, girls. go ahead. okay. it's starting. there we go. we've got to wait for their you music. there they go and they're so