(CNN) – Over the decades, a lot of coal miner blood has been spilled, despite efforts to pass laws to make their jobs safer.
This week's mining disaster in West Virginia seems to have struck a nerve like no other. The coal mining community there is having a very hard time coping with history once again repeating itself. Our John Roberts takes a look at coal mining's safety record and efforts made to improve it.
Read more: Rescuers enter West Virginia mine