don kilmer, an attorney representing the operators of a gun show, says the decisions clarify the basic rights of gun owners. >> the supreme court affirmed that the second amendment is an individual right. you don't have to be a member of a militia. and they also extended that right as enforceable against state and local government. so the second amendment applies across the country. every law-abiding citizen has the right to keep and bear arms for self-defense and other lawful purposes. >> reporter: but beyond that, everyone agrees, the effects of the court's decisions are unclear. >> we're going to have more challenges in the courts to vet out what are these issues. >> reporter: one of the first challenges will be to an alameda county law that, in effect, bans gun shows like this one in san jose on public property. it was passed following a 1998 shooting at the fairgrounds in nearby alameda county. sally nordyke and her husband, operators of a gun show at the fairgrounds, sued, saying the ban would put them out of business. >> they have an agenda that they go by, and they want to elim