WASHINGTON, DC - The iconic Canadian actors Margot Kidder and a Tantoo Cardinal were arrested Tuesday morning at 11:30 a.m. in Washington, D.C. as part of an ongoing sit-in at the White House to pressure President Barack Obama to deny the permit for a massive new tar sands oil pipeline.

"I can't think of a more important place to be," said Kidder, who is best known for her role as Lois Lane in four of the original Superman movies. "President Obama has the chance here to do the right thing and stop this pipeline. I'm here to help make sure he does it."

May 13, 2011 09:00 ET

Enbridge Pipeline Faces Prospect of Civil Disobedience; 500-Strong Crowd Rallies Outside Northern BC Municipalities Convention in Prince Rupert

"I will put my body in front of it." - Gerald Amos, councillor, Haisla Nation

PRINCE RUPERT, BRITISH COLUMBIA--(Marketwire - May 13, 2011) - Over 500 First Nations and concerned citizens from across Northwest B.C. gathered in Prince Rupert last night for a rally against Enbridge and its plan for pipelines and oil tanker traffic on the province's North Coast.

Canada's first elected Green Member of Parliament, Elizabeth May, today decried the devastation created by the Peace River oil spill and called for an immediate investigation and serious consequences for any corporate negligence.

"There has been a violation of the federal fisheries act, not to mention the negligence of failing to notify the public for five days," said Ms. May. "We need to ensure a full investigation and serious sanctions. Corporate negligence is not deterred without meaningful consequences."

May 2011 (Edmonton) - Little Buffalo community members, including school children, continue to experience nausea, burning eyes and headaches after one of the largest pipeline spills in Alberta history last Friday by Plains All American leaked nearly 30,000 barrels of oil into Lubicon traditional territory in the Peace Region of Northern Alberta.