PBS News Weekend - Season 7 Episode 65

On this edition for Saturday, August 17, pro-government and pro-democracy demonstrators face off in Hong Kong, and a retired police officer is coaching some of the growing number of seniors who use medical marijuana in Arizona. Also, Syrian residents who built a library amid the rubble of war, and what may come of peace talks between the U.S. and Taliban. Hari Sreenivasan anchors from New York.