“I can’t wait three days,” she muttered, staring at her dual monitors.

She never told anyone about the blurry, margin-scrawled PDF that saved her that sleepless night. But sometimes, when she passed a bank or an embassy with reinforced glass, she whispered a silent thanks to “R.C.,” whoever they were — an engineer, a rebel, or just someone who believed that bulletproof standards should not be locked behind a paywall in a crisis.

Frustrated, Maya did what any desperate 3 a.m. engineer does: she searched the obscure corners of the web. Forums. Archive sites. A defunct Russian engineering blog. Nothing.