There's a mysterious plane and helicopter circling over the camp at Standing Rock in North Dakota, where police and activists have been locked in a showdown over the Dakota Access oil pipeline for months. It's unclear who sent the plane or its purpose — but those on the ground believe it may be flying overhead to interfere with connectivity. Questions of surveillance have circulated at the camp. Protesters call themselves water protectors, because the pipeline would be built beneath the primary water supply of several tribal communities and cities downstream. These water protectors say they've had trouble getting connectivity and are also aware of allegations police may be targeting protesters who are checked in via Facebook.