Dr. Mounir Hakimi is all too familiar with innocent children being killed by bombs. He just never thought it would happen so close to home.

Hakimi is a surgeon who lives in Britain. But he grew up in Syria and has returned to the Middle Eastern country regularly to help train doctors and carry out operations during its years-long civil war.

On Monday night, the horror of young lives being targeted arrived on his doorstep. He lives and works near Manchester, where a suicide bomber targeted an Ariana Grande pop concert full of families, teenagers and kids.

Two days later, he operated on one of the wounded victims.