Johnson & Johnson says a second dose of its one-shot coronavirus vaccine offers greater protection against the virus. CBS News’ Mark Strassmann reports on the key finding of the company’s newest study. Then, emergency medicine physician Dr. Hilary Fairbrother joins CBSN’s Elaine Quijano with her analysis of the day’s coronavirus headlines. Source

As part of the Emmy-nominated series Note To Self, businesswoman, philanthropist and high-profile political wife Cindy McCain offers advice to her adolescent self. She reflects on motherhood, addiction and a lifetime spent alongside war hero, Arizona Senator and two-time presidential candidate John McCain. Source

In our series, Note to Self, we hear from tech entrepreneur Alexis Ohanian Sr. He co-founded Reddit, which is now ranked the sixth most popular website in America. Now he’s investing in other entrepreneurs and companies, as co-founder of the venture capital firm, Initialized Capital. In the last couple years, he also became a first-time parent when his wife, tennis superstar Serena Williams, gave birth to their daughter, Olympia. In a letter to his childhood self, Ohanian looks back on his life. Source

Cyntoia Brown made headlines when she was sentenced to life in prison at age 16 for killing a man who she says picked her up for sex. She was granted clemency earlier this year after spending 15 years behind bars. Now at 31 years old, she shares intimate advice for her 16-year-old self in a Note to Self. Source

“CBS This Morning” revisits a personal message from now President-elect Joe Biden. In 2016, he reflected on accomplishing some of his dreams and coping with devastating loss for the “CBS This Morning” series Note to Self. Source

A coroner said a body found in Wyoming was that of Gabby Petito, who disappeared while on a cross-country trip with her fiancé Brian Laundrie, who is still missing. Jericka Duncan has more on their relationship. Source

Johnson & Johnson said a second dose of its one-shot COVID vaccine offers stronger protection against the disease. Mark Strassmann has the latest. Source

After a chaotic withdrawal from Afghanistan and a rift with France over nuclear submarines, President Biden said it was time to move on and focus on fighting COVID and climate change. Ed O’Keefe has more on the president’s remarks to the United Nations. Source

The Department of Homeland Security is investigating an incident where Border Patrol agents on horseback are seen intimidating Haitian migrants at the Texas border. Migrants camped out there are having to face the choice of deportation back to Haiti or fleeing to Mexico. Manuel Bojorquez reports. Source

The U.S. Space Force has unveiled its new dress uniform, which includes a navy coat with six buttons that symbolize the sixth branch of the military. Source