Daylight sighting of groups of white objects, in distinct swirling masses, that disappeared and reappeared multiple times.September 8, 2012, 12:25pm, Waxahachie, TX, Weather was sunny and breezy, as a cold front was approaching, bringing temperatures from the 100’s to the 80’s, and there was not a cloud in the sky.As I was driving, I observed what appeared at first to be a group of birds, regrouping the way geese do sometimes, but these birds appeared to be white, which didn’t seem right for geese. Curious, because it was the wrong time of day when you typically would see this type of bird activity, and secondly, wondering what type of migratory bird it could be, I pulled into a parking lot to stop and get a better look.I now realized whatever I was seeing was definitely not birds. The images kept appearing and disappearing, making it difficult for my son who was with me, to see them at first, but then he saw them too.The prominent shape seemed to be two large groups of small white objects, and they seemed to be moving, swirling almost in a rolling manner, but fairly stationary as a group, before they would fade and disappear out of sight and then reappear at intervals that were about a minute or so apart. As they faded in and out, it was apparent that the collective object was moving horizontally in the sky.The two groups overlapped slightly, with one higher and to the left of the other. The images continued to disappear and reappear. At one point, the shape was distinctly different, suggesting the outline of a semi-sphere or maybe the bottom section of a boat, with a curved and upward shape that also seemed to be formed from the same type of white objects, also swirling and moving. As the images were far off in the distance, up in the sky, it was difficult to tell if the objects within the masses were moving, or if they were part of a larger object that was moving or rolling in the sky. It was a bright sunny day, so it was difficult to tell if the objects were something white, or perhaps lights. We continued to watch, for about 10 minutes before we saw a plane approaching the general vicinity of the object(s), and once the plane seemed to almost be to it, the object disappeared and we did not see it reappearing again after that.I am a 50+ accountant, and my son is 15, and an honors student.