Source: Video: US Nuclear Missiles Deployed in Italy, … against Russia

https://defensemaven.io/warriormaven/air/new-air-force-b-2-earth-penetrating-nuclear-weapon-changes-combat-strategy-aojDm8rPqkqIcmMmzEegDg/

What they are basically saying is- forget about the environment, we are in a star war game for which we need to have the atmosphere conductive. Get along with it or we will vaporise you.