US President Donald Trump signs an executive order in the Oval Office at the White House in Washington, DC, on January 24, 2017. US President Donald Trump signed executive orders January 24, 2017 reviving the construction of two controversial oil pipelines, but said the projects would be subject to renegotiation. Trump gave an amber light to the Keystone XL pipeline -- which would carry crude from Canada to US refineries on the Gulf Coast -- and an equally controversial pipeline crossing in North Dakota. / AFP / NICHOLAS KAMM (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
