So I took a trip to Niagara Falls and was going to fly from the US side and when I fired up the app and got ready to go a pop-up flashed on the screen. I was not really sure what it was and I checked both of the boxes, but this is the first time I have seen this. One asked if I had authorization to fly in the area, and the other was some kind of release of liability. Has anybody else seen this? The park rangers said there was no issue flying, so I don't know what that was. Any ideas?