What we know about climate change and deadly tornadoes

Scientists are examining the role climate change may have played in the twisters that killed dozens of people in recent days. PBS NewsHour looks at what’s known and what’s not yet clear. Many parents of school shooters ignore glaring warning signs. The Washington Post has the story of one grandmother who didn’t. NASA is sending its new telescope to a very special parking spot a million miles away. The Atlantic explains why. A guy threw half a billion dollars in bitcoin in the garbage. The New Yorker speaks to him about his unusual quest to get it back.