Tributes continued to pour in for Dolly Parton a day after her death. Singer-songwriter Martina McBride, named female vocalist of the year four times by the Country Music Association and three times by the Academy of Country Music, joined Amna Nawaz to discuss her friend and fellow icon.

This week, a Texas court heard arguments in a legal fight between a California couple and their surrogate over a newborn with a serious heart condition. The case has drawn the attention of anti-abortion activists pushing for new restrictions on surrogacy. Amna Nawaz discussed the case with Shefali Luthra, reproductive health reporter for The 19th News.

At least one in four NFL players has CTE when they die, according to a new study that examined the brains of former pro players. CTE is a brain disease thought to be caused by years of sustained head trauma and can only be diagnosed after an autopsy of the brain. Amna Nawaz spoke with Dr. Chris Nowinski of the Concussion and CTE Foundation, and a co-author of this study.

The world is mourning the passing of the queen of country, Dolly Parton. Her enormous legacy spans not only music, but the world of movies and entertainment, health care, philanthropy and education. Amna Nawaz takes a look at Parton's extraordinary life.