Robert F. Kennedy Jr. is arrested in Washington, Wednesday, Feb. 13, 2013, as prominent environmental leaders tied themselves to the White House gate to protest the Keystone XL oil pipeline. (AP Photo/Ann Heisenfelt)

Associated Press
Robert F. Kennedy Jr. is arrested in Washington, Wednesday, Feb. 13, 2013, as prominent environmental leaders tied themselves to the White House gate to protest the Keystone XL oil pipeline. (AP Photo/Ann Heisenfelt)
Robert F. Kennedy Jr. is arrested in Washington, Wednesday, Feb. 13, 2013, as prominent environmental leaders tied themselves to the White House gate to protest the Keystone XL oil pipeline. (AP Photo/Ann Heisenfelt)
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