US President Donald Trump announced sweeping restrictions preventing most foreign nationals traveling from much of Europe from entering the US for 30 days in an effort to try and combat the spread of the coronavirus. The move sent travelers scrabbling at airports around the world. And, the federal government has taken a lot of flack for inadequate testing for the coronavirus. How does testing in the US compare to other nations? Also, our new series, The Big Fix, launches. It's an ongoing look at what the world can be doing to combat climate change.