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.
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.
State Police in Montcoal, W.Va., monitor the entrance to the Massey Energy's Upper Big Branch mine where rescue and recovery efforts have been delayed again on April 9. Twenty-five miners are known to be dead and four remain missing from the explosion at the mine on Monday.
Mining companies have been slow to adopt new safety requirements. Critics say the West Virginia disaster shows that Congress needs to step in. The industry says it needs clearer guidance.