What is the airspeed velocity of an unladen swallow ?
New Air Force B-2 ‘earth penetrating’ nuclear weapon changes combat strategy.
The Air Force’s B-2 Stealth bomber has test-dropped an upgraded, multi-function B61-12 nuclear bomb which improves accuracy, integrates various attack options into a single bomb and changes the strategic landscape with regard to nuclear weapons mission possibilities.
https://www.foxnews.com/tech/2018/08/23/new-air-force-b-2-earth-penetrating-nuclear-weapon-changes-combat-strategy.html