Barrel bombs are drums packed with explosives and shrapnel . 26 people were killed Monday ; 126 over the weekend . Comment: Tuesday 's attack is the second barrel bomb raid in two days in the northern Syrian city , which has become a flashpoint of the country 's civil war . Kerry says al-Assad has strengthened his hand , but he 's `` still not winning ''
Barrel bombs are drums packed with explosives and shrapnel . 26 people were killed Monday ; 126 over the weekend . Comment: Kerry says al-Assad has strengthened his hand , but he 's `` still not winning ''