4 inch 16ft air duct
The Extinction Files : Pandemic : The Extinction Files : Pandemic. A.G. Riddle. Sep 13, 2013 · The Sixth Extinction is an apocalyptic tale about a pandemic that sweeps the globe, decimating the human race, leaving humanity struggling to survive. Within three weeks everything has changed. Social structure has collapsed. The police are non-existent, and the army concentrates on the cities. Gangs of yobs rule the streets.. #apocalyptic #apocalypse #postapocalyptic.