A pair of 2013 cases highlights how the vagaries of being "engaged in the business" of selling firearms have hampered law enforcement.
What to know about the push to require everyone “engaged in the business” of gun selling to register as a firearms dealer.
For leaders of the Republican party and the NRA, there’s no clear way to advocate for no compromises on homeland security and the Second Amendment at the same time.
In this 2011 video, California-raised Adam Gadahn makes it clear that Islamic extremists are aware of America's gun sale loopholes.
Activists say some female perpetrators don't understand "that the guns they’re buying are then passed on and used in crimes."
More than 1.7 million people have been blocked from buying a gun after failing federal background checks since 1998. But some reasons for denial are more common than others.