Almost every school in America practices for the day a gunman roams the halls. But it’s unclear if they’re doing this wisely — or whether they should be doing it at all.

The Supreme Court upheld the federal regulation of "ghost guns," or kits that enable buyers to assemble guns at home using parts that are often purchased online.

The lockdown at Glenpool Public Schools has been lifted after reports of a potential intruder with a weapon were disproven by ...