Rebel groups have taken Syria’s second-biggest city. Here’s who they are

Eight years ago, Syria’s civil war shifted in President Bashar Al-Assad’s favor after a Russian blitzkrieg on Aleppo helped him regain control over the country’s second biggest city.

​ Eight years ago, Syria’s civil war shifted in President Bashar Al-Assad’s favor after a Russian blitzkrieg on Aleppo helped him regain control over the country’s second biggest city. Read More Breaking News, Latest News and Videos | CNN