Until a vaccine is found, plasma therapy has been helping COVID-19 victims get better. Bill Whitaker has the story. Raw sewage from Tijuana is appearing on southern California's coasts. Lesley Stahl reports. And NASA is attempting to find signs of ancient life on Mars with the launch of Perseverance. Anderson Cooper has the story on this week's "60 Minutes." To learn more about listener data and our privacy practices visit: https://www.audacyinc.com/privacy-policy Learn more about your ad choices. Visit https://podcastchoices.com/adchoices

Scott Pelley investigates if politics are preventing the scientific community from doing crucial research that could help find a vaccine for the coronavirus. The Internet giant continues 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. 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. Bill Whitaker has the story. Those stories on this week's "60 Minutes." To learn more about listener data and our privacy practices visit: https://www.audacyinc.com/privacy-policy Learn more about your ad choices. Visit https://podcastchoices.com/adchoices