Dave.

What I’m asking is how tf did text messages and whatever in the walkie talkies ignite a spark strong enough to ignite the PETN?

Pager with firmware that activates an output on date/time X/Y and triggers an ignition signal. That signal is sent o an actual detonator in the device, which sets off the explosive.

Radio with DTMF receiver that activates an output when, for example, touchtone 4 is received over the air, or alternatively if the radio has GPS, another date/time activation via firmware.

Both of these things are relatively trivial for a nation-state to pull off.

So yes, in both cases it’s possible that faulty devices are still around. However, if all the rest of your group has had exploding pagers and radios, most people in the same group would have dropped their still-working pager or radio into a bucket of water by now. There’s probably a few, and they’re probably being carefully taken apart right now to see how it was done.

Afaik such an idea was nonsense previously.

It’s not nonsense, it just takes planning and resources. And now that people know it is possible, buying and using any sort of equipment for your group without having the nagging concern there might be a bomb in it is impossible. And that’s a pretty powerful limiter.

That’s easy. Just fly somewhere and bring it in your carry-on, airport security will let you know.

There’s a lot to be said for “http://yourISP.com/~username” being available 24/7 at no particular effort to you.

As another poster has mentioned, M-Discs are written using a Blu-ray writer and are good for a few hundred years, in theory.

Blu-Ray USB drive and M-Discs is about the best you can get at present. Keep the drive unplugged when not in use, it’ll probably last 10-20 years in storage.

Seeing as there hasn’t been much advance past Blu-ray, keep an eye out for something useful to replace it in the future, or at least get another drive when you notice them becoming scarce.

90% of users when they are presented with the UAC popup when they do something:

“Yes yes whateverrr” <click>

when they’re powered down.

There’s no periodic cell refresh in flash memory like there is in DRAM. When USB sticks are plugged in, all you are doing is powering up the flash chip and interface ICs.

You’d have to read a block then write it back to actually refresh the stored charges in the cells.

in which case I will go one level down, to the calculateExtraCommissions() method.

In which case you will discover that the calculateExtraCommissions() function also has the same nested functions and you eventually find six subfunctions that each calculate some fraction of the extra commission, all of which could have been condensed into three lines of code in the parent function.

Following the author’s idea of clean code to the letter results in a thick and incomprehensible function soup.