The Cowboy Indian Alliance arrived in Washington, D.C., on Tuesday to protest the controversial Keystone XL Pipeline.

The Washington Post, The New York Times and The Ottawa Citizen posted video reports from the horse ride into the National Mall. Participants are camping there all week to raise awareness of the impacts of proposed pipeline on water, sacred sites and the environment.

The protest will culminate with a march to the White House on Saturday to urge President Barack Obama to reject the permit for the pipeline. The State Department has delayed review of the project due to litigation in Nebraska and to review the large number of comments submitted by the public.

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Native Groups, Ranchers Launch D.C. Protest Against Keystone XL Pipeline (Democracy News 4/23)
'Cowboys And Indians' Stake Out The National Mall To Protest Keystone XL (The Huffington Post 4/23)
Cowboys, Indians Protest Keystone Pipeline (Reuters 4/23)
Cowboys and Indians Ride Through DC to Protest Keystone Pipeline (ABC News Radio 4/23)
"Cowboy Indian Alliance" says 'no' to keystone (USA Today 4/23)
Encampment in Washington D.C. protests Keystone XL pipeline (Nebraska Radio Network 4/23)
Cowboys, Indians unite in opposition to Keystone XL pipeline (The Omaha World-Herald 4/23)
Native Americans protest against Keystone XL oil pipeline (Press TV 4/23)
Cowboys and Indians ride into U.S. capital to protest Keystone pipeline (Al Jazeera 4/22)
South Dakota tribes take their KXL fight to Washington (KSFY 4/22)
Cowboy Indian Alliance Sets Up Camp in DC, Says No Keystone XL Tar Sands Pipeline (NRDC Blog 4/22)
Cowboys and Indians Ride Through DC to Protest Keystone XL Pipeline (ABC News 4/22)
Native Americans Hit D.C. to Protest Keystone Pipeline (NBC News 4/22)
Cowboy and Indian Alliance protest Keystone pipeline (Medill News Service 4/22)
Cowboy and Indian Alliance protests Keystone XL Pipeline (Voxxi 4/22)
Cowboys, Indians, Green Groups Protest Keystone (The Wall Street Journal 4/22)
Keystone XL pipeline protesters gather in Washington (CP 4/22)
Ranchers, natives demonstrate against Keystone in Washington (The Globe and Mail 4/22)

Related Stories:
Zoltán Grossman: Cowboy Indian Alliance rides in Washington (4/23)
Gyasi Ross: Stop Keystone XL Pipeline and protect homelands (4/23)
Winona LaDuke: Tribes won't see benefits from Keystone XL (4/22)
Photos: Cowboy Indian Alliance rides to National Mall in DC (4/22)
Native Sun News: Keystone XL Pipeline foes headed to DC (4/21)
State Department needs more time to review Keystone XL (4/21)