In 2017, the journal Perspectives in Biology and Medicine published a pair of articles arguing in favor of a tax on soda. The two authors - Dr. Neal Baer, a television writer and producer and a pediatrician, and Dr. John Maa, a San Francisco-based surgeon - provide a concise history of the obesity epidemic and its connection to the consumption of soda in their articles. They joined us for separate interviews about the issue and why they feel tackling the problem of soda is important to the health of Americans.