If you own guns, have any intentions of ever owning a gun, or think you might ever be near a gun, you need to learn this shit.
A - Assume every firearm is loaded
C - Control the muzzle direction at all times
T - Trigger finger must be kept out of the trigger guard and off of the trigger
S - See the the firearm is unloaded. PROVE it safe
P - Point the firearm in the safest available direction
R - Remove all cartridges
O - Observe the chamber
V - Verify the feeding path
E - Examine the bore for obstructions
I have worked with firearms for years now and I firmly believe that it isn't gun control that is lacking, it's gun education.
With that said, I hope he learns from this incident, get's better, and comes back strong. WAR DIESEL!!