The Deepwater Horizon oil rig burns in the Gulf of Mexico in April 2010. The rig's crew were new to their positions just before the explosion. Such staffing reorganizations are increasingly common as the industry grapples with a staffing shortage.
U.S. Coast Guard/Getty Images
A Shell-owned ethylene cracker plant on Pulau Bukom, Singapore. Several U.S. states are competing for a similar plant the company plans to build in northern Appalachia.
Courtesy of Shell Chemicals
A woman pays her respects at a statue of Joe Paterno outside Beaver Stadium on the Penn State University campus in State College, Pa., after learning of his death on Sunday.
Gene J. Puskar/AP
The Syncrude tar sands mine north of Fort McMurray, Alberta, is seen in November. Alberta's tar sands would supply the oil for the prospective Keystone XL pipeline.
Rick Santorum receives a call at his campaign headquarters during his Senate re-election bid in 2006. The former senator was attempting to keep his Pennsylvania Senate seat, which he later lost to Democrat Bob Casey Jr.
Jeff Swensen/Getty Images