Turkish Prime Minister Recep Tayyip Erdogan has enraged families of the victims of the Soma mine disaster by characterizing mining accidents as "ordinary things."
In fact, the disaster appears to have ordinary causes familiar to mining experts, who note that well-known precautions exist to prevent the kind of explosion that killed so many in Turkey.
"The risk is constant," says Tom Hethmon, a professor of mine safety at the University of Utah and a consultant to
