Kaj Larsen: global shark populations are crashing

CNN’s Soledad O’Brien and Dr. Sanjay Gupta host a CNN PRESENTS that includes reports from Kaj Larsen on how shark hunts are depleting the global population – and the impact of the crash of the species on the larger food chain; Amber Lyon reports on the pollution caused by the use of plastic bags and one man’s fight against the industry to reduce their use; and Dr. Gupta reports on the challenges faced by returning veterans seeking healthcare.

This edition of CNN PRESENTS will air Sunday, Oct. 30 at 8:00pm and 11:00pm ET & PT.