Students protesting against the proposed Keystone XL pipeline march near the residence of US Secretary of State John Kerry (back) in Washington,DC on March 2, 2014 before marching on to the White House. Students from around the country gathered to oppose the tar sands oil pipeline from Canada, which they say is dangerous for the environment. Kerry is set to announce in the coming months whether the proposed $5.4 billion oil pipeline serves the national interest and will be constructed following years of confrontation between environmentalists and the oil industry. AFP PHOTO/Nicholas KAMMNICHOLAS KAMM/AFP/Getty Images