Instead, we can only gape at pictures of a twisted metal frame that hardly resembles the bus that was once filled with happy, singing children, or watch the widely circulated video of the aftermath of what happened in the market district of Saada in northern Yemen, in which a distraught, failing man raises the blue tarp of a pickup truck to reveal a tangle of young bodies as he lifts up the limp arm of one of the dead schoolkids.