US Sen. Jay Rockefeller D-WV and US Sen. Joe Manchin, D-WV, right, listen to testimony during a hearing on pipeline safety in Charleston, W.Va., Monday Jan.28, 2013. Before the hearing, Rockefeller criticized the U.S. Office of Management of Budget for slowing down potential safety rules meant to respond to the Sissonville explosion and similar accidents. (AP Photo/Charleston Daily Mail, Tom Hindman)

Associated Press
US Sen. Jay Rockefeller D-WV and US Sen. Joe Manchin, D-WV, right, listen to  testimony during a hearing on pipeline safety in Charleston, W.Va., Monday Jan.28, 2013.  Before the hearing, Rockefeller criticized the U.S. Office of Management of Budget for slowing down potential safety rules meant to respond to the Sissonville explosion and similar accidents. (AP Photo/Charleston Daily Mail, Tom Hindman)
US Sen. Jay Rockefeller D-WV and US Sen. Joe Manchin, D-WV, right, listen to testimony during a hearing on pipeline safety in Charleston, W.Va., Monday Jan.28, 2013. Before the hearing, Rockefeller criticized the U.S. Office of Management of Budget for slowing down potential safety rules meant to respond to the Sissonville explosion and similar accidents. (AP Photo/Charleston Daily Mail, Tom Hindman)
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