FILE - In this Jan. 24, 2012 file photo, protestors against the Keystone XL pipeline dressed as referees throw red penalty flags during a rally on Capitol Hill in Washington. Embarking on a second term, President Barack Obama faces mounting pressure on a decision he had put off during his re-election campaign: whether to approve the $7 billion proposed Keystone XL oil pipeline between the U.S. and Canada. (AP Photo/Manuel Balce Ceneta, File)

Associated Press
FILE - In this Jan. 24, 2012 file photo, protestors against the Keystone XL pipeline dressed as referees throw red penalty flags during a rally on Capitol Hill in Washington. Embarking on a second term, President Barack Obama faces mounting pressure on a decision he had put off during his re-election campaign: whether to approve the $7 billion proposed Keystone XL oil pipeline between the U.S. and Canada.  (AP Photo/Manuel Balce Ceneta, File)
FILE - In this Jan. 24, 2012 file photo, protestors against the Keystone XL pipeline dressed as referees throw red penalty flags during a rally on Capitol Hill in Washington. Embarking on a second term, President Barack Obama faces mounting pressure on a decision he had put off during his re-election campaign: whether to approve the $7 billion proposed Keystone XL oil pipeline between the U.S. and Canada. (AP Photo/Manuel Balce Ceneta, File)
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