What'll Ya Have? Part 3 of 5

So far the first two parts of my little apocalyptic series haven't been too far fetched.  They're both well within the realm of possibility.  The third installment is a topic of sci-fi movies, since there have been sci-fi movies.  From the wonderfully cheesy "Plan 9 from Outer Space" up to "Independence Day" and "War of the Worlds."

Number Three: Alien Invasion
It's a chilly, but perfectly clear spring morning in any city of your choice.  It doesn't matter which, because the outcome will be the same no matter where you chose.  People are going about their usual morning business.  Early risers are out jogging, people are begrudgingly commuting to their dollar-a-day jobs, worrying about things that will soon seem silly, like bills and due dates and deadlines.

Then, something happens.  Everything seems to become suddenly silent, and a shadow slowly draws itself over the entire city, like a long black curtain, completely blotting out the sun.  Cars screech to a halt on the roads and highways and drivers stare up in disbelief and what they see.  In the sky is a huge craft of some type, with a diameter larger than the entire city itself.  The sudden silence is broken by the sound of the approach of military jets, scrambled from nearby Air Force bases to intercept and investigate the gigantic intruder.  As they draw close, sharp flashes of light, reminiscent of the energy weapons we've all seen in sci-fi movies, come from various spots on the object, instantly vaporizing the fighters in giant balls of flame.

Honestly, we wouldn't stand a chance!

Emergency sirens sound all over the city, sirens left over from the Cold War to warn of an air raid or the threat of a nuclear attack.  Most citizens have never heard these sirens before, but they hardly notice because the streets have falls into pure panic and the beginnings of total chaos.  New reports on the TV warn citizens to stay inside, but that is the last thing that they intend to do at this point.

It doesn't take the invaders long to reduce the city to smoldering ruins.  The spacecraft makes quick work of any structure that contains life, and people are hunted on the streets by autonomous devices, which seem to be designed specifically to neutralize human presence.

None of our weapons, even our previously discussed nuclear warheads, have any effect on the alien ship.  The blinding blasts simply bouncing off the ship's armor, while at the same time making the entire area radioactive.  Those who survive the global invasion are forced to flee to the most remote and inhospitable corners of the planet in an attempt to survive, but given the highly advanced technology wielded by the aliens, their attempts at evasion may be short-lived.

-My 'guesstimated' chance of this actually happening:  0%.  There's really nothing on this planet that such an advanced race of aliens would need, that they don't already have.

-My 'guesstimated' population survival rate:  If such an thing were to happen, my guess would be that about 15%, maybe 20% would survive initially.  But, the clock is ticking for them!

Guesstimated population survival rate: 15% - 20%, but they better get real smart, real fast!