Hannah was arrested on August 30, 2011, in front of the White House as part of a sit-in to protest against the proposed Keystone oil pipeline from Alberta to the U.S. Gulf Coast. In a "Huffington Post" piece co-authored with Phil Radford, Hannah explained that the purpose of her action was to "shine the light" on the President's decision on the pipeline for "millions of voters" to see. In October 2011, Hannah and other pipeline opponents rode horses and bicycles and walked from the Pine Ridge Indian Reservation to the Rosebud Reservation to protest the project.