In an attempt to further pressure EPA Administrator Lisa Jackson to enforce the Clean Water Act and halt mountaintop removal coal mining (MTR), activists erected two 20-foot-tall, purple tripod structures in front of the agency’s headquarters. A pair of activists perched at the top of the tripods have strung a 25-foot sign in front of the EPA’s door that reads, “EPA: pledge to end mountaintop removal in 2010.” Six people are locked to the tripods and say they won’t leave unless Administrator Jackson commits to a flyover visit of the Appalachian Mountains and MTR sites, which she has never done before.