How to Make Your Own Two-Factor Authentication Key

WASHINGTON — You don’t need to spend $40 or $50 to get a two-factor authentication (2FA) USB key to help you log into web accounts. Instead, you can build one yourself, or, failing that, buy one for $8 on Amazon.

Source: How to Make Your Own Two-Factor Authentication Key

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This EMP Cannon Stops Cars Almost Instantly

We’ve heard of electromagnetic pulses cutting steel in milliseconds, but apparently they can also be used to stop moving cars just as fast. The cannon demonstrated in the video here is still a prototype, but it definitely seems to work. Easy to build, hard to explain to Law 😛

Source: This EMP Cannon Stops Cars Almost Instantly