An image clicked in 2017 still haunts Ali Al-Senaidar, a photographer based in Old Sanaa, Yemen. He remembers the faces of the two boys—aged 13-14—very clearly. One boy, wearing a blue thawb (robe), is walking alongside his father on a near-empty street. Both father and son are holding hands; both are casually carrying Kalashnikovs on their shoulders and are walking away from the camera.