A team of federal investigators arrives Monday at the scene of West Virginia's mining disaster, a week to the day after an explosion claimed 29 lives.
Authorities have said that high levels of volatile methane gas inside the mine may have played a role in the disaster. High gas readings have forced crews to stop recovering bodies. They'll need to drill another hole to vent the mine before they can continue.
On the first Sunday since the explosion that killed 28 workers and a contractor, people gathered in churches to mourn the dead and honor their profession.
Pastor Gary Williams knew many of the victims. He says over time, the emptiness people feel will fade away, but that he never wants to forget what happened.