On Monday in Washington D.C., three blocks north of the White House, climate activists shut down traffic by banging drums, chanting, and dragging a 24-foot long boat into the middle of a busy intersection.The sailboat was painted bright pink on one side, and yellow on the other, and emblazoned with the words, “Tell the Truth,” and “Rebel for Life.” As more than 40 police officers surrounded the protesters, one of the crew raised a flag over the ship with a black X surrounded by a circle. It’s the symbol of a group called the Extinction Rebellion.