Another reason to make sure your fuel gauges work, and not to just 'time' your fuel.
A 172 (may as well have been an RV) left my home base the other day for a short flight. When he returned he discovered that he had been a target. The bullet missed the left fuel tank by about 6".....and it missed the pilot by only about 4'.
Here's a pic of where the round entered the bottom of the left wing:
Here's the exit hole in the top of the wing....slightly larger than the entry hole:
If you look closely at this pic you can see daylight from the entry hole clean through the exit hole:
For comparison, the round universal rivet heads are 1/8" (shank). Any of you rifle owners care to take a guess on what size bullet would make a hole that large?
I suppose an investigation would be difficult at best?