US President Barack Obama (L) and US Secretary of State John Kerry (R) attend the inaugural session of the COP 21 United Nations conference on climate change, on November 30, 2015 at Le Bourget, on the outskirts of the French capital Paris. More than 150 world leaders are meeting under heightened security, for the 21st Session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP21/CMP11), also known as "Paris 2015" from November 30 to December 11. AFP PHOTO / POOL / Thibault Camus / AFP / POOL / THIBAULT CAMUS (Photo credit should read THIBAULT CAMUS/AFP via Getty Images)
