Complex sentence: In 2007, the Russian military announced that they had tested a thermobaric weapon nicknamed the "Father of All Bombs" ("FOAB"); the weapon is claimed to be four times as powerful as the MOAB.
Split into simpler sentences: In 2007, the Russian military announced that they had tested a thermobaric weapon nicknamed the "Father of All Bombs" ("FOAB"). The weapon is claimed to be four times as powerful as the MOAB.