What if there's an alien invasion tomorrow ?

what if,what happens if,science documentary,interesting video,amazing facts,interesting facts,fantasy movies,fantastic four,plotting,plot structure,story structure,real fact,fairy tales,top 10,what,if,apocalypse,excel,cool video,epic,video,What if tomorrow,what if scenario,what if earth,aliens,UFO,ufo sightings,ufos,pentagon ufo video,alien abduction,What if there's an alien invasion tomorrow,alien invasion,The Martian