Fighting intensifies over Syria's largest city

This citizen journalism image taken on Thursday September 6, 2012 and provided by Idlib News Network ENN, purports to show Syrian rebels taking cover during a battle against Syrian forces troops in Salqin village in Idlib province, northern Syria. (AP Photo/Idlib News Network ENN) THE ASSOCIATED PRESS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY, CONTENT, LOCATION OR DATE OF THIS HANDOUT PHOTO