The same memo where they made that recommendation also said: "Unmanaged 'messaging apps,' including any app with a chat feature, regardless of the primary function, are NOT authorized to access, transmit, process non-public DoD information. This includes but is not limited to messaging, gaming, and social media apps. (i.e., iMessage, WhatsApps, Signal). "
Even after that, they were again explicitly warned not to use Signal for anything sensitive:
https://www.cbsnews.com/news/nsa-signal-app-vulnerabilities-...
But neither of those applies for the Signal chat in question. That was not confidential communication, it was top secret active military data. And, like any other military-related decision, it was very much in the category of information that must be recorded and was going to eventually be releasable under public record laws, as soon as its confidential nature expired, 50+ years from now most likely.
Of course, the more fundamental reason was that he wasn't looking at where the aeroplane was going, not even periodically.
Clicks the button without knowing what impact it will have on a device he uses for national security communication -- reckless.
Uses a personal device -- careless and reckless.
You couldn't even be bothered to read the sources you're quoting.
> That doesn't sound "extremely reckless negligent and careless". It sounds like he misclicked one time on an unexpected popup.
hwut? We're not talking about accidently texting your ex-girlfriend though I know people like you need to rely on false equivocations to sanewash the garbage.