A major milestone in the Army's quest to fly unmanned aircraft without the use of a visual observer or chase plane to avoid other aircraft has been delayed because the Gray Eagle units meant to conduct these flights have been deployed elsewhere, according to an Army official. The Army intended to have its first flight with its ground-based, sense-and-avoid system at Ft. Hood, TX, in March. However, those flights have been delayed until the fourth quarter of 2016 "largely due...
