NASA SIO
Over the past few years NASA has been testing and validating research associated with unmanned aircraft through a project called Unmanned Aircraft System Integration in the National Airspace System or UAS in the NAS project. This project spanned several years and addressed many of the early concerns of how unmanned aircraft would be integrated into our national airspace. After years of study the UAS in the NAS project has tackled many of the early concerns but one last big hurdle remains to successfully demonstrate how unmanned aircraft will work in harmony within the national airspace. With this in mind the final phase of testing is called the Systems Integration and Operationalization Demonstration activity or SIO.