The logistics of reopening colleges during a pandemic are incredibly complicated. Can it be done safely? CNN Chief Medical Correspondent Dr. Sanjay Gupta explores this question with former U.S. Surgeon General Dr. Richard Carmona, head of the University of Arizona’s reopening task force, and Dr. Rochelle Walensky, an infectious disease physician at Massachusetts General Hospital.  To learn more about how CNN protects listener privacy, visit cnn.com/privacy