January 10, 2017 10:30 pm “My turn to say thanks”: Obama figures out who he is, searches for a purpose in life on the streets of Chicago US & World Videos 2:36 From our tables to our medicine cabinets, we literally owe trillions to coral reefs 0:53 5 things to know about USWNT head coach Emma Hayes 1:07 How long will your fridge keep food safe during a power outage? 0:20 One in critical condition after shooting that injured 4 in Waterbury 1:21 Watch the trailer for NBC's My New Favorite Olympian