You need a license to operate a motor vehicle and a CDL to operate a commencial vehicle.  That would be a good place to start with firearms.  The ease of access to these high powered military style assault rifles is insane.  Garbage man telling a a highly intelligent war hero and astraunaut how it is might be the most ridiculous things I've read on the Internet in a while.  Especially coming from someone who can't properly use a comma.