The Army intends to start flying unmanned aircraft at Ft. Campbell, KY, later this month using a ground-based, sense-and-avoid system to replace the use of visual observers or chase planes -- making it the second location to install this system, according to the service official overseeing the effort. The Army hopes to stand up the installation at Ft. Campbell by the middle of February, Paul DiNardo, the assistant product director for the ground-based, sense-and-avoid program, said in a Jan. 31...