sumpnz remarked,
"Keep in mind the ultra wealthy usually own at least one private jet with East coast to Hawaii unrefuelled range. If they
(and the pilot and he copilot etc) can get to the airport the plane is at they can probably get to Hawaii even if all out nuclear war is happening."
In addition, there is an inherent personnel problem. Everyone who is helping you get away will want a ride for themselves and their families.
Besides, in the case of Hawaiii, it is the most concentrated western base of US military power. Oahu will be plastered flat. (Don't know on which island Zuck has his compound, but chances are the other islands will be granted a similar courtesy --and Guam and the Aleutians...)
Rocketman said,
"...until they run out of ammo..." ...or out of personal guards, who will be sniped at interminably. You can store 100,000 rounds of ammo easily, but you can't store 100,000 guards. <evil grin>
That crater was very impressive, but bear in mind that was a smallish underground shot to determine excavation effectiveness (hole-making ability) in Project Plowshare if I recall correctly. Nevertheless, if it were an airburst, you could count on a large area of devastation.
A smallish airburst:
(Source BBC)
Terry, 230RN