From reading many articles and info about the possibility of Antimatter being used as a weapon has caught my attention due to the incredibility destructive power such a weapon could posses. Since the annihilating 1g of matter with 1g of antimatter is equal to a yield of 42.8 Kilotons, if a weapon were to annihilate 1kg of matter with 1kg of antimatter it would equal to around a yield of 42.8 Megatons, similar in size to the Tsar bomb.
The blast from the annihilation of 8kg of matter with 8kg antimatter could reach yields of 342 Megatons , which is far larger then any device detonated by man.
As well, the nuclear fallout produced from a antimatter weapon would be massive along with plasma falling on to the Earth's surface.