From the Editor-in-Chief, by K.P. Valavanis-. Control and Limitations of Navigating a Tail Rotor/Actuator Failed Unmanned Helicopter, by R.D. Garcia · A. Brown -. Indoor Hovering Control of Small Ducted-fan Type OAV Using Ultrasonic Positioning System, by J. Shin · S. Ji · W. Shon · H. Lee · K. Cho · S. Park-. Vision Based Control for Fixed Wing UAVs Inspecting Locally Linear Infrastructure Using Skid-to-Turn Maneuvers, by S.J. Mills · J.J. Ford · L. Mejías -. Dynamic Compensation for Control of a Rotary wing UAV Using Positive Position Feedback, by B. Ahmed · H.R. Pota -. Indoor UAV Control Using Multi-Camera Visual Feedback, by H. Oh · D.-Y. Won · S.-S. Huh · D.H. Shim · M.-J. Tahk · A. Tsourdos-. Hovering Flight Improvement of a Quad-rotor Mini UAV Using Brushless DC Motors, by A. Sanchez · L.R. García Carrillo · E. Rondon · R. Lozano · O. Garcia-. Stabilization and Trajectory Tracking of a Quad-Rotor Using Vision, by L.R. García Carrillo · E. Rondon · A. Sanchez · A. Dzul · R. Lozano-. A Catadioptric and Pan-Tilt-Zoom Camera Pair Object Tracking System for UAVs, by M. Tarhan · E. Altug-. Evaluation of Guidance Performance in Urban Terrains for Different UAV Types and Performance Criteria Using Spatial CTG Maps, by Z. Kong · B. Mettler-. A Visual Global Positioning System for Unmanned Aerial Vehicles Used in Photogrammetric Applications, by A. Cesetti · E. Frontoni · A. Mancini · A. Ascani · P. Zingaretti · S. Longhi-. Meshing and Simplification of High Resolution Urban Surface Data for UAV Path Planning, by F.-M. Adolf · H. Hirschmüller -. Computational Modeling for Automatic Path Planning Based on Evaluations of the Effects of Impacts of UAVs on the Ground, by F.L.L. Medeiros · J.D.S. da Silva-. A Minimum Risk Approach for Path Planning of UAVs, by L. De Filippis · G. Guglieri · F. Quagliotti-. Automatic Take Off, Tracking and Landing of a Miniature UAV on a Moving Carrier Vehicle: Fuzzy Logic Based Approach to Design of Autonomous Landing System for Unmanned Aerial Vehicles, by O. Cetin · S. Kurnaz · O. Kaynak -. Vision-Based Landing of Light Weight Unmanned Helicopters on a Smart Landing Platform, by M.H. Mahoor · R. Godzdanker · K. Dalamagkidis · K.P. Valavanis -. Monotonous Trend Estimation of Deck Displacement for Automatic Landing of Rotorcraft UAVs, by X. Yang · M. Garratt · H. Pota -. Fusion of IMU and Vision for Absolute Scale Estimation in Monocular SLAM, by G. Nützi · S. Weiss · D. Scaramuzza · R. Siegwart -. On-board and Ground Visual Pose Estimation Techniques for UAV Control, by C. Martínez · I.F. Mondragón · M.A. Olivares-Méndez · P. Campoy -. Autonomous Formation Flight Test of Multi-Micro Aerial Vehicles, by D.I. You · D.H. Shim -. Towards Autonomous Micro UAV Swarms, by A. Bürkle · F. Segor · M. Kollmann -. Search Strategies for Multiple UAV Search and Destroy Missions, by J. George · S.P.B. · J.B. Sousa-. UAV Consumable Replenishment: Design Concepts for Automated Service Stations, by P. Kemper F. · K.A.O. Suzuki · J.R. Morrison -. A Survey of Airworthiness and Certification for UAS, by G. Guglieri · V. Mariano · F. Quagliotti · A. Scola-. Optical Brain Imaging to Enhance UAV Operator Training, Evaluation, and Interface Development, by J. Menda · J.T. Hing · H. Ayaz · P.A. Shewokis · K. Izzetoglu · B. Onaral · P. Oh-. Towards Palm-Size Autonomous Helicopters, by S. Bouabdallah · C. Bermes · S. Grzonka · C. Gimkiewicz · A. Brenzikofer · R. Hahn · D. Schafroth · G. Grisetti · W. Burgard · R. Siegwart -. Intuitive 3D Maps for MAV Terrain Exploration and Obstacle Avoidance, by S. Weiss · M. Achtelik · L. Kneip · D. Scaramuzza · R. Siegwart -. Vision Based Position Control for MAVs Using One Single Circular Landmark, by D. Eberli · D. Scaramuzza · S. Weiss · R. Siegwart -. Calibration Techniques for UAV Antenna Arrays, by H.S. Mir -. Real-Time Implementation of GPS Aided Low-Cost Strapdown Inertial Navigation System, by L.