 An Israeli airstrike Saturday hit a UN school where displaced people were sheltering in Gaza. The Gaza Health Ministry says at least 16 people were killed, another 50 wounded. NPR's Kat Lonsdorf has more. And a warning, this report contains some disturbing details. The school is in Nuserat in central Gaza, where many fled after recent evacuation orders. NPR's producer in Gaza, Anas Baba, went to the school shortly after the strike. It was filled with families and children.