I was working in the yard when i noticed this strange contrail, moving from south to north. i saw it make what appeared to be a 90 degree turn. so i ran in and got my camera. as i was taking pictures the contrail disappeared. i have been around airplanes my whole life and have never seen anything like this. the event was over nas fallon in northern nevada. might have been an f-22 or f-35 showing of for the navy. i never saw what kind of craft was leaving the contrail, couldn't even see a speck. nas fallon is 25 to 30 miles from my property.