The annual Perseid meteor shower, which is known for some of the brightest shooting stars, is slated to happen this week. A woman attacked by a man with a knife receives help from the most unlikely source. And we have this hour's top trending stories. Guests: Andrew Fraknoi, Heather Laskin, Gabby Morrongiello, Jeffrey Stephens, Andres Malave, Jason Wert. Trending Today USA 08-11-16 Part 5