They know its coming, they see it, film it, and just wait to see the outresult of it. Thats how many Syrians go through their everyday life, by chance. One guy explains how his brother died, "My brother bought bread from the bakery and he opened the door going into the building when they hit and killed everyone. He is killed now". 

This is Aleppo, you just by your chance of life. The guy holds his brother's picture that he found under the rubble, he points to it and says, "he is young". He then says as he points down to the stones, "he smells" becuase he probably had been down there for few days and his family is still not able to get to him, to barry him.