How have state firearm laws changed over time? Over the past 27 years, some states have loosened the rules for gun owners and the gun industry, while others are getting stricter.
The candidate endorsed by the NRA this year wasn't always so pro-gun. A sociologist and physician explains how Trump's position on guns could play out if he were to win in November.
Do guns on campus threaten the very ideology of American higher education -- one that encourages critical thinking and intense scrutiny?