Ok, 1 + 2…
1. Why drop the MOAB bomb now? So the military could calibrate its effect, especially on bunkers and tunnels. Who has tunnels with artillery aimed at Seoul? North Korea.
2. Why calibrate MOAB now? Because the first 100 days of the new regime are about up, and he has to do something, so let’s go bomb NK before — April 30 is 100 days?