Doctors Jon LaPook and Holly Phillips join “CBS This Morning: Saturday” to discuss the week’s top medical news including an invisible cold weather killer and a pioneering new treatment for a disease that affects hundreds of thousands of Americans. Source

Joe Biden will formally accept the nomination for president on Thursday and Kamala Harris will accept the nomination for vice president on Wednesday. Source

Nick Dietz compiles some of the week’s best viral videos, including a 15-month-old experiencing rain for the first time, personal injury lawyer Jamie Casino’s epic Super Bowl XLVIII commercial and a beagle trying hard to get a water bottle. Plus, 4-year-old Jackson gets emotional listening to A Great Big World and Christina Aguilera’s song “Say Something.” Source

There’s more evidence of the growing diabetes epidemic and scientists try to pinpoint the best treatment for breast cancer patients. Alison Harmelin has the day’s top health stories. Source

The Miami Beach Police Department release surveillance video of pop star Justin Bieber being processed by an officer during his arrest in Miami Beach in January. Bieber was charged with driving under the influence, resisting arrest and driving with an invalid license. Source

Snoop Dogg is a force to be reckoned with in the music world, and now this multiple-Grammy-nominated artist is giving something back to the community: He’s founded and coaches in a football league for underprivileged youth. Lee Cowan reports. Source

As we celebrate the 50th anniversary or the Beatles’ arrival in America, Julian Lennon tells CBS News what it was like growing up as the son of a Beatle. Source

For the first time, the American Heart Association issued guidelines for preventing strokes in women. High blood pressure and smoking are risk factors for everyone, but the AHA says risks unique to women include gestational diabetes and the use of birth control pills. Dr. Jon LaPook reports. Source

On Thursday, family and friends attended Philip Seymour Hoffman’s wake. A private funeral will be held Friday in New York City. Norah O’Donnell reports. Source

Only a few months before the Beatles appeared on “The Ed Sullivan Show,” the band had been unknown in the U.S., and they were unsure about how they’d be received. Ringo Starr speaks with Anthony Mason about Beatlemania and how it felt to reunite with Paul McCartney 50 years after they led the British invasion of America. Source