We leave you this morning in the quiet of Lower Antelope Canyon near Page, Arizona. Videographer: Jamie McDonald Source

Two summers ago, everyone was getting involved in the ice bucket challenge. While critics said the challenge was just a way to make a splash without actually doing anything, the effort raised $115 million dollars in just 30 days. Jim Axelrod has more on how the social media phenomenon has impacted ALS research. Source

Marni Nixon was known as a incredible performer who mainly worked and sang behind the scenes. She was the voice behind songs in many iconic films, including My Fair Lady and was considered America’s most unsung singer. Source

A South Florida neighborhood is now ground zero for Zika in America. Officials believe four people who tested positive for the virus were infected close to home. There are renewed calls for Congress to return from vacation and pass an emergency funding bill to prevent the virus from spreading. Marlie Hall shows us what officials in Florida are doing to fight Zika. Source

CBS News contributor Dr. Tara Narula and her husband, plastic surgeon Dr. David Cangello, join “CBS This Morning: Saturday” to discuss dangerous ingredients that are found in dietary supplements sold around the country and the health risks of traveling abroad for medical care. Also, Dr. Cangello explains how patients can avoid looking unnatural after cosmetic surgery. Source

Mosquitoes have apparently picked up the Zika virus and are now spreading it in south Florida; It’s been over a year since Steve Hartman helped his dad pack up move out of the family home for good. Source

CBS News’ chief medical correspondent Dr. Jon LaPook has been warning for months about the inevitable occurence of local Zika transmissions. It seems that time has arrived in Florida. He weighs in on how Americans can protect themselves. Source

Mosquitoes have apparently picked up the Zika virus and are now spreading it in south Florida. There are four cases so far, the first in the U.S. transmitted locally. The state has now embarked on an extensive spraying program to wipe out as many mosquitoes as possible. David Begnaud reports. Source

Some people were not happy about seeing Bradley Cooper at the Democratic convention. CBSN’s Vladimir Duthiers has more on the backlash online. Source

A video presented at the DNC presented a closer look at Hillary Clinton’s life. The video was narrated by actor Morgan Freeman. Watch the full video here. Source