The former "Grey's Anatomy" actor shared details of the progression of his symptoms and the emotional toll of living with the neurological disease.

ABC News correspondent Dr. Darien Sutton receive an exclusive look at the first FDA trial testing robotic telesurgery with the surgeon in Florida, the patient with prostate cancer in Africa.

This follows House Speaker Nancy Pelosi's announcement that she will take the first steps toward impeachment. ABC News' Ines ...