Bill Weir interviews the nation's top climate change experts and leaders, including former vice president Al Gore. They help explain the wide-ranging threats communities will increasingly face as climate change continues unabated.

The timeline of how the coronavirus spread across the globe and how President Trump reacted to the virus's developments as they occurred.

Fareed Zakaria presents the story behind China's deadly secret including the timeline of what China knew and when they knew it about the coronavirus pandemic.