'Signal-gate': Trump Team Brings Neocon Journo Into Yemen Attack Planning Sessions?

In one of the most bizarre foul-ups (or was it?) of all time, Trump National Security Advisor Mike Waltz invited The Atlantic's editor-in-chief into a Signal discussion group (!) where the Admin's attack on Yemen was being planned. What if it was no leak at all and instead a "pro-war psy-op"? With secure communications equipment available to the Administration...why did they discuss apparently highly classified war-planning information on a commercial chat app? Will heads roll?