mystery tonight why did a navy medic open fire injuring two sailors? blunt testimony: an expert witness tells the jury derek chauvin used excessive force when he kept his knee on george floyd s neck for more than nine minutes. voting rights fallout, with major league baseball moving its all star game out of georgia, we ll take a deeper look at the state s new voting law, the bad and the good. why experts tell us texas will be the next battleground. border crisis: the revealing moment we asked students in guatemala who wants to come to the u.s.? all of you would like to go to the united states? o donnell: frantic rescue: incredible video of a helicopter rushing to save the crew before their cargo ship almost capsized. and super hero kids. one woman s prescription for fighting serious childhood illnesses. this is the cbs evening news with norah o donnell, reporting from the nation s capital. o donnell: good evening, to our viewers in the west and thank you for joining