Rainforest Action Network’s Understory blog has an excellent story explaining the rationale for this action:

Before dawn this morning, a small team of climate activists is rapelling from the US observation deck at Niagara Falls. Dangling hundreds of feet above the ground, they’re sending a special welcome message to Canadian Prime Minister Stephen Harper ahead of his first official visit to the White House.

So here’s our welcome to you, Prime Minister Harper. Now, please, go home.

And take your dirty tar sands with you.

Here are a few photos from the action:

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More photos at the RAN website. A video interview with one of the activists who organized this action is available at Current.com.

Josh Nelson is the publisher of EnviroKnow: The Politics of Sustainability.