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Intel's x86 UD2 instruction traces back to two rival undefined opcodes, 0F FF and 0F B9

A Microsoft engineer explains the history behind x86's UD2 instruction, which architecturally guarantees an invalid opcode exception and is used by compilers to mark unreachable code. Before UD2 existed, developers relied on undocumented byte sequences like 0F FF and 0F B9 that happened to trigger the same crash behavior, splitting programmers into informal camps depending on which sequence they used.

Sahuarita, Arizona Police Chief Confirms Two-Year Use of Electro-Shock GLOVEs

Sahuarita, Arizona police chief John Noland told the Daily Wire that his 68-officer department has used electric-shock gloves, known as GLOVEs, for roughly two years, calling the devices successful at gaining compliance. His comments follow reporting that ICE has ordered a large supply of the same equipment and that Oklahoma officers used them on students during the 2025-2026 school year.

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