Overview: Headlines for September 21, 2016; Protests Erupt over Police Killings of Terence Crutcher & Keith Lamont Scott in Tulsa & Charlotte; U.N. Summit for Refugees & Migrants Creates New Urgency for Global Crisis of 65 Million Displaced; Holocaust Survivor: Trump Jr.'s Skittles Comment Brings Back Dark Images of Children Murdered in WWII; Did Obama Host a Summit on Migrants While Ignoring a Refugee Crisis in the U.S.'s Own Backyard