Activists : The barrel bombs fell on a school in an opposition-held part of Aleppo . Hide Caption 1 of 8 Photos:Syria's civil war, in pictures Al-Nusra claims responsibility for attack . The car bombs exploded in an Alawite neighborhood ; President al-Assad is Alawite . The Homs attack killed 79 civilians and 21 pro-government fighters , dissidents say .
Activists : The barrel bombs fell on a school in an opposition-held part of Aleppo . Hide Caption 1 of 8 Photos:Syria's civil war, in pictures The car bombs exploded in an Alawite neighborhood ; President al-Assad is Alawite . The Homs attack killed 79 civilians and 21 pro-government fighters , dissidents say .