We also looked and studied further the use of drones in construction. Let me start with the definition. A drone is any unmanned vehicle that can be piloted remotely or autonomously by typically referred to it as unmanned aerial vehicles, UAV's. The concept of drones has existed since the early 20th century, but is finally reaching a point of commercial viability. Currently, drones can be used for aerial photography, mapping, accident investigation, inspections, area monitoring, cargo transport in some services, law enforcement, storm tracking, and many other uses, just to name a few. The area of drones in construction is definitely in its growth phase. Some studies estimated the market of a drone to be around $100 billion, with construction as the largest sector at an estimated 11.4 billion. Now, in the study, we also identified several current applications of a drone technology in our industry. Let me share a few. The use of drones in pre-construction side to review, one example. Another one, aerial surveying and mapping, measurement of excavations and stockpiles from the excavation, monitoring site conditions such as progress and safety and especially safety, we also, we saw uses of drones in inspecting inaccessible areas. Now, the value added from drones ranges from time and cost savings, such as drones decreased manpower by increasing data collection speed. Another area, value added of drones, inspections and tracking. Drones can access more places and see larger areas, and finally, a third example of the value added of a drone, site monitoring and control. Monitoring progress and conditions of site ensures a smoother and safer construction process than the current conventional methods. Yet, there are also several challenges to deal with when we talk about drones in construction, such as regulations from the FAA here in the US, required licenses, it is still banned in several cities, can not be flown also beyond line of sight from operator, also of course, the area of how to deal with privacy and security concerns. Now, moving to the next trend or example that I highlight in this course, in this area. Part of my research team also studied the use of construction robotics in our industry. We did the study carefully, 25 examples of construction robotics in many areas, and we divided into few sections. One section of our work was focused on benefits. Let me share a few examples of benefits of construction robotics. First one is safety. Robots can perform dangerous construction tasks like demolition or complex [inaudible] , which lessen the risk of injury to human workers. Also, second benefit, efficiency, and the productivity. Robots can often perform the same task much faster and can even work 24/7 on projects without getting fatigued. Last example, I would share in the benefits, accuracy. The technology is less prone to error. The products that robots build are more consistent in shape and more consistent in during construction and the overall quality. Just to name a few here, also, as I just mentioned, we looked at the 25 robot examples. One that personally I really like, is the trend in inspection robots, where they actually use Lidar technology and the 360 degree camera to do more reality and site capture of the projects. Such examples we looked at which I encourage you also to check is Spot walk from Boston Dynamics, HoloBuilder, Scaled robotics, and Doxa.