[BwanaNdege]

Second? What is the first?

The Russian "FOAB".

Here's the father of all bombs: Russia's answer to the MOAB

"The so-called father of all bombs is thought to be about four times as big as the MOAB. It's a thermobaric bomb with a destruction radius of nearly 1,000 feet and a blast yield of nearly 44 tons of TNT. "

[ColdOne]

Thanks.