Only on the ?CBS This Morning? podcast, journalist and author Beth Macy joins "CBS This Morning" co-host Gayle King to discuss her new book, "Dopesick: Dealers, Doctors, and the Drug Company that Addicted America." In the book, Macy tracks the opioid epidemic from its early days in rural America to the nationwide crisis it is today. She describes the battle people are enduring to become sober and how racism has been an unintended factor in the epidemic.