The Transportation Security Administration (TSA) is tasked with securing all transportation systems in the United States, including a thorough luggage check at all airports in the country. TSA's creation was in response to the 9/11 attacks on the U.S. in 2001, to prevent hijacking and to keep a suspected individual from boarding the plane.

Airports have strict security protocols, and luggage check is a must — whether it's locked or unlocked. But there's one luggage lock that does the magic: the TSA-approved lock that allows all TSA agents to open your baggage using a master key.

If you happen to see that little red diamond attached to a luggage, it's the Travel Sentry Red Diamond logo, which means that it meets the standard set by the Travel Sentry, the organization that licenses securit

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