60 Minutes S52E29 - Pandemic Politics | Amazon | Ghost Guns

Pandemic Politics – Is politics preventing the scientific community from doing crucial research that could help find a vaccine for the COVID-19 virus? Scott Pelley investigates. 

Amazon – The internet giant continues to take orders and send millions of packages each day, but some of its workers say Amazon isn't keeping its workforce safe. Lesley Stahl reports. 

Ghost Guns – They are virtually untraceable weapons that can be made at home using legally purchased parts. Ghost guns have turned up in criminal cases in most of the country, reports Bill Whitaker, in this year-and-a-half investigation.