The Crescent Creatures and the King are involved.
In CRESCENT CREATURES, it's revealed that the titular antagonists have a metabolism heavily resembling unstable nuclear reactors, making them literal living natural nuclear reactors.Alternatively, the Special Trees and the secondary effects of using the Nuclear Option against them are.
In STARRYSPHINX, Leonard mentions that permanently cutting down Special Trees was impossible until 1945, the same year as the creation of the nuclear bomb and the Trinity Test, though this came with severe consequences. It's never elaborated what these consequences were, so it's likely that we're about to find out in The Trinity Desk Project.The series will be a way to recanonize The Croatan Torso
Much like how The House in the Ocean did to the Crescent King lore.The series will finally confirm the existence of a vastly larger Multiverse in the Monument Mythos lore.
Although there has been heavy implications that this was already the case, many fans still believe that there's only two universes in the Mythos, the Deanverse and the Nixonverse. The Trinity Desk Project's possible tie-in with the Deanverse will finally settle that there's more than two.NASA's "Front Row" program wasn't an execution, but a recruitment drive.
The rocket launch might have a similar invisibility instigating effect to nuclear weapons, and if so then picking some of the best and brightest America has to offer to be the next generation of invisible agents makes sense. The cremation urns sold to families may have just been a morbid cover story.There is actually a Tillon in the series.
What happened is that they were eviscerated by NASA before they could do anything.