Re: I can sense the ghost ...
"Speaking of exams - owning a gun in USA doesn't seem to require exams."
It requires a Federal background check and there are limits on how many you can but per unit of time. California is going to require checks to buy ammunition if they haven't already. Never mind that one could drive to a neighboring state and buy all they wish without such checks. It's not like you can just walk into a store, plop down some cash and walk out armed like Neo in the Matrix.