The Father of All Bombs

Aviation Thermobaric Bomb of Increased Power (ATBIP; "Father of All Bombs" is a Russian-designed, bomber-delivered thermobaric weapon.

This weapon was claimed to be the most powerful conventional (non-nuclear) weapon in the world, more powerful than "Mother of All Bombs" or MOAB.
FOAB was successfully field-tested in the late evening of 11 September 2007.