<I can't do it on Nov. 28, but probably can on Nov. 29. Can you help?>

I just signed up to be a part of a visit to an Obama 2012 office on November 28th, when people in all 50 states will be visiting campaign offices to ask President Obama to reject Keystone XL.

Keystone XL is an environmental disaster waiting to happen: it will carry 800,000 barrels a day of the world's dirtiest oil 1500 miles across the Ogallala aquifer and countless other irreplaceable natural resources. Not only that, it's the fuse to the largest carbon bomb in North America, the Alberta tar sands, which if developed could mean 'game over' for the climate according to NASA scientist James Hansen.

President Obama alone has the authority to block the pipeline - Congress plays no role. We're asking him to stop this disaster before it happens, and help us "be the generation that finally frees America from the tyranny of oil," as he declared when he began his run for president way back in 2008.

By taking one day to visit offices in all 50 states, we'll show the President that there is a huge amount of support for him to stand up for his campaign promises and reject this pipeline. Click here to sign up: http://www.tarsandsaction.org/sign-up

Hoping you can be there with us - we don't have much time to convince the President to reject the pipeline, and this day will be crucial to do it. Hope to see you there.