Protestors march in front of the White House in Washington during a rally calling on President Barack Obama to reject the Keystone XL oil pipeline from Canada, as well as act to limit c

 

              Protestors march in front of the White House in Washington during a rally calling on President Barack Obama to reject the Keystone XL oil pipeline from Canada, as well as act to limit c
Protestors march in front of the White House in Washington during a rally calling on President Barack Obama to reject the Keystone XL oil pipeline from Canada, as well as act to limit carbon pollution from power plants and “move beyond” coal and natural gas, Sunday, Feb. 17, 2013. (AP Photo/Manuel Balce Ceneta)