However , the last remaining Drakh ships bypass the defense grid and plunge into Earth orbit , releasing a black gaseous weapon that enshrouds the Earth .
The Earth and Alliance ships escape just as the planet killer destroys itself and most of the Drakh assault fleet .
The last remaining Drakh ships bypass the defense grid and plunge into Earth orbit , releasing a black gaseous weapon that enshrouds the Earth .
The Earth and Alliance ships escape just as the planet killer destroys itself and most of the Drakh assault fleet .