Usually manned and unmanned aircraft don’t fly in close proximity for very good reason, but we were granted an exemption on Tuesday, April 9th 2019. As part of a joint Headwall and NEON (National Ecological Observatory Network, sponsored by the National Science Foundation and operated by Battelle) project, a Headwall drone and a DeHavilland DHC-6 Twin Otter, one of the NEON Airborne Observation Platforms (AOPs), where flown simultaneously in controlled airspace within a short drive of the University of Colorado – Boulder.