David Shaffer • 612-673-7090 Twitter: @ShafferStrib
Protesters in Washington in 2011 were already demonstrating against the tar sands pipeline. Environmentalists say extracting crude from sand emits three times more carbon than conventional oil production, contributing to global warming.
Andrew Harrer • Bloomberg News
In Bradshaw, Neb., earlier this month, this sign made its point about the Keystone XL pipeline that could run through this field.