For the millions of us who fly regularly, these sorts of incidents, and the prospect of would-be terrorists testing the vulnerability of airplane security, brings up the questions of when passengers should intervene, and what they should do.

FORBES: A How-to, When-to Guide For Airplane Vigilantes

But White Lodging, the Hyatt franchisee that manages the Houston hotel, believes that the rooms were opened using a device that takes advantage of a glaring security vulnerability in keycard locks built by the lock company Onity, specifically a model of lock that appears in at least four million hotel rooms worldwide.

FORBES: Security Flaw In Common Keycard Locks Exploited In String Of Hotel Room Break-Ins

To demonstrate the vulnerability, the Department of Homeland Security and Idaho National Laboratory in Idaho Falls recently showed reporters a cyberattack on a mock-up of a chemical facility.

CNN: Inside a government computer attack exercise