observed a white sphere about 10 feet in diameter with 2 F16s chasing it.

I worked at the gold mine next to round mountain, the town. the mountain is a hill on the east side of the 8 mile wide valley. 60 miles south is tonopah. the mine is an open pit type mine and is removing the mountain / hill. I was sitting in my haul truck on a terrace that is about 1000 feet above the valley floor. I was facing north west waiting for my turn to get loaded with ore. the sun had gone down about 10 to 15 min. before. when a white ball about 10 feet in diameter came from the southeast at about 50 yards away. it headed to the west of the valley. it stopped 1 mile from the west side of the valley and maybe 20 feet from the valley floor. it made this 7 mile move in 1 second. it stayed there for half a second or less. it then went northeast over the mountain range, 1 mile away from me. also in 1 second. about 2 seconds later 2 f16s came from the southeast to the northwest. they were 50 yards away both sideways so I could see the tops of there helmets. there afterburners were on shooting about 6 feet out. there is no way they they were going to catch whatever that was. I got on the radio and asked the other guys if they saw that. one guy said yah those jets were really close. I said "no, what they were chasing". nobody said anything. if the object made any noise I couldn't hear it over the haul truck engine. it was white like a dim led.