Stephanie Ramos has the latest as nearly 45 million are on alert for possible tornadoes and torrential rain in the Northeast, after a twister tore a path of death and destruction in the Heartland; Trevor Ault has new reporting on a very close call between two packed passenger planes, after one jet suddenly turned into the path of the other in San Francisco, just seconds from disaster; Rachel Scott has details on Elon Musk's Oval Office farewell as he steps away from his role as special government employee; David Muir looks back at the life and legacy of Emmy award-winning actress Loretta Swit, best known for playing Major Margret Houlihan on "M*A*S*H"; and more on tonight's broadcast of World News Tonight with David Muir.