I have been part of a joke-email distribution network for many years, and have tried to organise all of them into one big blogsite full of the good stuff. This is not nearly all of them - posting my full resume of jokes would be a full-time job.
This is the US Air Force's new 21,000 pound MOAB --- the "Mother of All Bombs". It is an upgrade of the 15,000 pound "Daisy cutter" which was used in Afghanistan. It is rumored that the USAF is planning to drop the MOAB on Tehran, Iran.
From the looks of it, if you get hit with this --- you haven't got a prayer!