. >>> and a father says amanda knox's acquittal and trial over shadowed his daughter's death.ghter was beautiful and intelligence. and saying that knox was jealous. saying, quote, amanda hated meredith because people loved her more than amanda." >>> and quite a scare for a tv newscaster. take a look. he was on air, just as a 6.7 magnitude earthquake struck chile this morning. you see him holding on to the desk. that studio's in santiago. the quake, centered about 70 miles away. look at the broadcaster, rolling on through. wondering aloud if it was a major quake or a minor one. it did trigger mudslides. no injuries were reported. and you got your news in real-time. >> impressive. >> congratulations to that guy, because i'm heading for the hills. >>> now, diane sawyer, with a preview of tonight's "world news." diane? >> good morning, josh. and tonight, they are so beautiful to watch, as you know. but struggling to find food. the polar bears. the ice they call home is vanishing beneath them. you're going to hear something new, how some americans think they may save them. and that