This photo provided by Azaz Media Office, a Syrian anti-government activist group, which has been authenticated based on its contents and other AP reporting, shows a Syrian White Helmet civil defense worker extinguishing a burning car at the explosion scene, in Azaz town, north Syria, Wednesday, May 3, 2017. Syrian activists say a large explosion in a northern town along the border with Turkey has killed and wounded several people. (Photo by Azaz Media Office via AP Photo)
