i was attending a hs tennis match at merriville hs in north west indiana when i noticed 3 orbs in the distant horizon, facing south (just south of us 30) i thought they were planes at first but they did not move like planes, i then thought they were balloons but they kind of shifted in shape it was almost like they were pulsating. the color was silver metallic when they pulsated and then turned in to a black dot, it felt very strange, it lasted about 5 minutes...also i noticed many high flying planes leaving massive chemtrails all over the sky it almost looked like a checker board or grid of chemical trails...very creepy and i bet spraying that stuff can't be good for us humans, i don't know if the chemical spraying had anything to do with the ufo sighting but i just want to document what i saw. i pointed the orbs to a woman sittung next to me and she also saw them and commented that seeing the silvery objects in the sky was one of the strangest things she has ever seen!