Silver hammered disc shaped object over Snowbank Lake, Minnesota, June 1970

Back in June of 1970, at Snowbank Lake, Minnesota, around 9:00 pm, there were three of us on a boat fishing, myself and my two uncles.  While sitting in the boat fishing and looking out at our surrounding, all of a sudden coming up above the tree line, parallel to us was a silver hammered disc shaped object, no sound, moving very slowly towards us, about a 1/2 mile away ,heading north to Canada.  All three of us stood up in the boat looking at this object and then we saw four “Airsac” jets (being out of Duluth, Minnesota air force base) were roaring towards us, breaking the sound bearer, which was above our heads and in pursuit of this object.  Object went straight up into the air and we watched the jets take off after it.  It must have been about 7 to 8 minutes chasing it into Canada.  After perusing it a short time later the same jets flew back over our boat again.  About 1,000 feet above us, going slow and we could see the pilots, giving us thumbs up and w! e gave them thumbs up too.
Yes, I do believe we are not alone.
Witness indicates that date is approximate.  PD