Any responsible gun owner knows not to shoot a gun in the air. What goes up, must come down.
This guy is an idiot.
EDIT: Was reading the comments on the source. Everyone blaming Biden, calling him an idiot, and saying the charges should be dropped. Biden isnt the problem here.
Biden isn't THE problem but his advice is A problem since warnings shots are illegal in most of the country for obvious reasons: the falling bullet / pellets can definitely injure people miles away; if fired into the ground they can ricochet with the same result; and intentional horizontal misses can go through walls and hit someone.
Biden's comment was worse than stupid, it was ignorant. Nothing new for Biden though - he's the personification of the Peter Principle; people in an organization tend to rise to their level of incompetance.