U.S. President Barack Obama waves as he arrives in Antalya, Turkey, Sunday, Nov. 15 2015 for the G-20 summit. The 2015 G-20 Leaders Summit is held near the Turkish Mediterranean coastal city of Antalya on Nov. 15-16, 2015.
U.S. President Barack Obama waves as he arrives in Antalya, Turkey, Sunday, Nov. 15 2015 for the G-20 summit. The 2015 G-20 Leaders Summit is held near the Turkish Mediterranean coastal city of Antalya on Nov. 15-16, 2015. Ali Atmaca AP
U.S. President Barack Obama waves as he arrives in Antalya, Turkey, Sunday, Nov. 15 2015 for the G-20 summit. The 2015 G-20 Leaders Summit is held near the Turkish Mediterranean coastal city of Antalya on Nov. 15-16, 2015. Ali Atmaca AP

World leaders vow vigorous response after Paris terror spree

November 15, 2015 10:51 AM