@CNN: Bill and Melinda Gates write that in almost 20 years leading their foundation, they’ve found surprises can be powerful calls to action. On the occasion of their annual letter for 2019, they share 9 surprises that have changed how they approach the world. https://t.co/33BBYVdFZP https://t.co/cIchvKIvgn

Bill and Melinda Gates write that in almost 20 years leading their foundation, they've found surprises can be powerful calls to action. On the occasion of their annual letter for 2019, they share 9 surprises that have changed how they approach the world. https://t.co/33BBYVdFZP pic.twitter.com/cIchvKIvgn

— CNN (@CNN) February 12, 2019