US issues emergency order to suppress coal dust blasts. Probes of the Upper Big Branch coal mining disaster, which killed 29 people in April, are focusing on coal dust as the likely culprit.
President Obama addressed the families of 29 West Virginia coal miners who died in a mine explosion earlier this month. Miners say they hope he will honor his pledge of better safety, but many are skeptical.
Investigators say 'no stone will be left unturned' in finding the cause of the Upper Big Branch mine explosion. Criminal charges are rare following mine disasters, and causes for explosions can be complex.
Mine rescue chambers have been required since 2006, even though federal authorities could have required them as far back as 1969. But it's still unclear whether miners in this week's explosion in West Virginia could have reached the chambers.
Rescue efforts were focused on drilling holes into the coal mine in Montcoal, West Virginia, to vent toxic gas. But Wednesday evening, the situation was still too dangerous to send in a team.