COVID: With Marin On Brink Of Yellow Tier, An Expert Gives Pointers On Mask EtiquetteMarin County could be the first Bay Area county this year to drop into the least restrictive Yellow Tier on Tuesday. What will the proper mask etiquette be? A health expert weighs in.
COVID Reopening: Sonoma County Opens Most Government Offices After Move To Orange TierSonoma County reopened most of its government offices Monday after moving into the orange tier of the state's COVID-19 business reopening system.
Peloton Tread+ Owners Told to Stop Using Treadmill in 'Urgent Warning' From Gov't AgencyA U.S. government agency issued an "urgent warning" for users of Peloton's Tread+ following multiple dangerous incidents with the machine, including a child's death.
COVID Vaccines: Contra Costa Drop-In Sites End Frustration Among Those Struggling To Find AppointmentsContra Costa County is offering vaccinations, with no appointment necessary. It's a way of reaching those who have been hesitant to make appointments, or simply unable to.
COVID : San Francisco Allows For Small Indoor Gatherings Among VaccinatedHealth officials in San Francisco announced it would follow new guidance from the state and the Centers for Disease Control allowing small indoor gatherings without masks or social distancing among fully vaccinated people.
COVID Reopening: San Jose Sharks Welcoming Fans Back At SAP Center April 26; Testing Or Vaccination RequiredFor the first time since the onset of the COVID-19 pandemic, the San Jose Sharks announced that fans would be welcomed back to SAP Center for remaining home games starting later this month.

CBS World News

Did dirty Rio water sicken Olympian sailor?The highly-polluted bay used for some Olympic events has been a big concern for athletes and organizers, but now a European sailor's Olympic dream may be cut short because the water in Rio de Janeiro apparently made her sick. Ben Tracy reports.
Do Greenland sharks live for 400 years?New research has found that some Greenland sharks may be older than the United States. Scientists estimate the sharks, which live in the north Atlantic, can live to about 400 years. Charlie D'Agata reports on how this revelation could help scientists learn more about aging in humans.
Millions trapped and under siege in Aleppo, SyriaMore than two million people in Aleppo are in danger of running out of food, fuel, medical supplies and water in a city that has been under siege for weeks now amid incessant fighting. A group of doctors warn that if attacks on medical facilities continue at their present rate, they could all be destroyed in a month. Debora Patta reports from Syria's capital of Damascus.
Government report claims CENTCOM manipulated ISIS intelligenceCBS News has learned that a hard-hitting report by Congressional Republicans accuses U.S. Central Command, also known as CENTCOM, of manipulating or repressing intelligence about ISIS. The military's CENTCOM is responsible for American security interests in 20 nations, stretching from Egypt through the Arabian Gulf region and into central Asia. Jim Axelrod reports.
U.K. music icons demand artists get fair pay for streamsMore than 150 British musicians, including Paul McCartney, Kate Bush and Annie Lennox, wrote to British Prime Minister Boris Johnson asking for reforms.
New ISIS video claims to show U.S. special ops trainingA new ISIS propaganda video purports to show American and British special forces with their New Syrian Army recruits at a training camp in Jordan. As Charlie D'Agata reports, the big question is -- how did they get the video?