Dozens formed a `` human chain '' to keep heavy machinery from moving at pipeline site . Opponents want U.S. President Barack Obama , who in the past has rejected rapid approval , to outright reject the pipeline project , arguing it would be an environmental disaster . Three protesters suspended themselves from 50-foot pine trees to stop pipeline work . Score: 6 Company building the pipeline did not immediately respond to CNN calls .
Dozens formed a `` human chain '' to keep heavy machinery from moving at pipeline site . Three protesters suspended themselves from 50-foot pine trees to stop pipeline work . Score: 6 Company building the pipeline did not immediately respond to CNN calls .