What Happened in Wuhan?: A lack of transparency from Chinese officials and looming geopolitical consequences have damaged the credibility of a WHO-led inquiry into how the virus that causes COVID-19 originated. Lesley Stahl reports on why questions still linger on the origin of the coronavirus. 

Ransomware: How cybercriminals hold data hostage... and why the best solution is often paying a ransom. Targets have included hospitals and municipalities, but the FBI says anyone on the internet should expect to be attacked by cybercriminals. Scott Pelley reports.

Sir David: Sir David Attenborough explains what he thinks needs to happen to save the planet. The legendary wildlife filmmaker tells Anderson Cooper why urgent action on climate change is crucial and why we need to save nature in order to save ourselves.