"I think the reason is because people who work underground are well aware of the fact that every day you go in, you don't know if you're coming out." - ELAINE CULLEN, Coal Hogs Work Safe, 99% Invisible #99PercentInvisible #99pi #CoalHogsWorkSafe #ElaineCullen

"I don't look like a miner." - ELAINE CULLEN, Coal Hogs Work Safe, 99% Invisible #99PercentInvisible #99pi #CoalHogsWorkSafe #NationalMinersDay #ElaineCullen

"They became more personal and started to tell miner's stories and the mine companies themselves started printing stickers for their workers." - ROMAN MARS, Coal Hogs Work Safe, 99% Invisible #99PercentInvisible #99pi #CoalHogsWorkSafe #NationalMinersDay #RomanMars