- Fierce fighting rages in northwest of Iraq's second-largest city
- 5,000 have fled each day since push to retake Mosul began
- ISIS used 22 car bombs in first 72 hours of operation
Mosul, Iraq (CNN)The little boy in the yellow jacket runs and jumps, alternatively waving and wiping the dust off his face. In his right hand is a strip of white cloth, intended to show he and his family are civilians. His parents are exhausted and wary, having left their home in west Mosul's Mushairfa neighborhood, but the little boy can barely contain his excitement.