freaky mann...........................................saw 4 balls of bluish- green light hovening over the big bend dam located on the missiour river near ft. thompson, sd. they proceeded to move east towards highway 50....... when they where over head you could see light moving in cicle and you could make out a disk shape object........there was no sound, of anykind and the shot striat up in to the air.......the others followed and then they dissappeared.........talked to local law enforcement.....they had many silmiar reports dating back to early 70's.............