US military commander admits Afghan hospital 'mistakenly struck' by airstrike

Protestors hold up their hands painted red as Commander of US forces in Afghanistan John Campbell testifies during a Senate Armed Services Committee hearing on Capitol Hill in Washington D.C., the United States, Oct. 6, 2015. Campbell acknowledged on Tuesday a U.S. airstrike "mistakenly" struck a hospital in Kunduz, Afghanistan on Saturday that killed 22 civilians. [Photo/Xinhua]