Aeham Ahmad found global fame after videos of him dragging his piano into the war torn streets of Syria went viral online. Known as the 'Pianist of Yarmouk', he witnessed unimaginable suffering after his home was bombed by President Assad's forces, then captured by the IS terrorist group. He speaks to Martha Kearney about what he saw and his escape to Europe after his piano was torched by IS. (Image: Aeham Ahmad, credit: BBC)