A man previously sought by authorities stabbed 11 people at a Michigan Walmart before being subdued by bystanders and charged with terrorism and attempted murder.

A lone gunman killed four—including an NYPD officer—inside a Manhattan skyscraper before taking his own life, exposing vulnerabilities in corporate security and reigniting debate over lone-actor violence.

A deliberate car-ramming attack in Mannheim killed two and injured eleven, highlighting Germany’s growing concerns over public safety following a string of violent incidents.