nato scrambling jets ten times across europe to track and intercept russian military planes. here at home, several wildfires burning near mt. rushmore. hundreds of homes evacuated tonight. the spacex rocket exploding during a test flight. and news from the nfl tonight. next season will look a lot different. and more trouble for major the dog at the white house. good evening and it's great to have you with us here on a tuesday night. those troubling new numbers on the coronavirus here in the u.s. what authorities are seeing in more than 20 states now. and the reason why, they say. but we are going to begin tonight with the searing new testimony in the trial of former police officer derek chauvin in the death of george floyd. the young witnesses today, one just 9 years old. three teenagers taking the stand, too. darnella frazier, 17 at the time, there that day with her