President Barack Obama reviews a map of the Upper Big Branch mine 10 days after the deadly explosion that killed 29 mine workers. Also pictured are MSHA coal mine safety chief Kevin Stricklin (at left), Assistant Secretary of Labor Joe Main (second from left) and Labor Secretary Hilda Solis (far right). Immediately after this meeting, the President promised "to ensure that we're pursuing mine safety as relentlessly as we responsibly can."
Pete Souza/The White House
Don L. Blankenship, chairman and chief executive officer of Massey Energy Company (left), watches as protesters disrupt a luncheon at the National Press Club, where he spoke on Thursday.
Mine ventilation issues are critical to running a safe coal mine. Here, a rescuer walks through a blocked tunnel in the Crandall Canyon Mine, northwest of Huntington, Utah, where six coal miners were trapped in 2007.
A Mexican soldier stands guard as a haul of marijuana and cocaine are incinerated in the background in November 2009. Fighting among the drug cartels — and between government forces and the cartels — has cost nearly 24,000 Mexican lives since late 2006.
Jesus Alcazar/AFP/Getty Images