Eight states currently have laws that allow people to carry guns on college campuses. In 24 others, individual colleges can decide whether to allow firearms on the premises. The primary rationale for these laws, according to their supporters, is safety: School shooters, they say, are less likely to succeed in their attacks if students and teachers are armed and able to fight back. But a new study from Johns Hopkins University shows that campus carry laws are unlikely... (GunPolicy.org)