Standing at my bonfire pit with my sons, very loud wooshing/jet engine slowing, only lower octave. we look at each other and both looked up saw a set of light that were either running back and forth across a very large craft, or a very small craft running a tight zig zag formation, it went quiet a distance and while i was watching, i thought i lost sight, soi stepped away from the fire and nothing it was gone. about an hour later a light was moving directly out of the north and a small light dropped out of it falling to earth miles north of me, maybe in the missouri river?, any way i watched to other light not flashing get about half way across the sky behind my house it it disappeared, or shut it's lights off. regardless it was gone. i wouldn't say that these things happen all the time but i am this was the fourth and fifth sighting from here. i have seen the one with the lights running back and forth 2 times in 8 years. i believe that if i were outside more at night this would be observed much more often. thank you for your time.