Opponents of the proposed Keystone XL oil pipeline have carved a message of resistance into a field near Neligh, Nebraska, located in the project's path.
The 80-acre artwork, that reads "Heartland#NoKXL," is the latest protest environmentalists and landowners have employed against TransCanada's proposed pipeline that would carry oil to the Gulf Coast.
Critics of the pipeline want President Obama to reject the project because they fear it could contaminate groundwater and contribute to pollution.
TransCanada has said the pipeline will have upgraded safety measures, including remote control shut-off valves and frequent inspections. It has already built the southern leg of the pipeline between Oklahoma and Texas. The section of the project that still needs approval would cross Montana, South Dakota, Nebraska and Kansas.