The Perfect Defence

This thought is an outcome of many doomsday movies that have accumulated in my head. If such a day is bound to come sometime, what sort of a defense should we build to see some specimen of human race through. Of course we have seen bunkers, walls, steel cabins etc. but we have also seen all of them getting breached. Now the problem at hand would get out of control if we don’t define the scope so.
Type of dangers /attacks possible…
1. Lets start with tough ones, Nuclear attack, hence extreme heat and pressure followed by radiation
2. Comets striking earth
3. Air in atmosphere getting toxic for humans to survive
4. Food in atmosphere gets toxic
5. Sun runs out of heat and light
6. Earth goes under water, completely.
7. Earthquakes, not simple 7 on richter scale ones but full fledged tectonic plates running over each other
8. SuperVolcanoes
9. Super tornadoes
10. Air borne and incurable lethal virus
11. Zombie Godzillas… :D
12. Extreme sustained heat, which will evaporate all water on earth (no seas or rivers, though u can condense steam to get water to drink)
13. And probably the toughest of the 16 to beat, the possibility of one of the guys in the chamber going nuts of being in the chamber for 20 years and killing everyone else including himself...
14. One dumb mistake from one of the 10 people on board... Like leaving the toilet flush open and running out of all water to drink... with Zombie Godzillas outside... :D
15. Ohhh damn and how can I forget intelligent aliens, hell bound to destroy those 10 humans in the box.
16. Hot male / female look alike but actually spies sent by me to fail the mission... Their weapon is just their looks and promise of a really amazing sexual adventure, like no one in the box has ever dreamt of... lol... well it sounds cheesy but the central idea here is how will you fight against greed and lust...


Well to make life easier, you can assume not all of them happen together. But the solution should be able to sustain human life in each of the above scenarios individually. I am in a pessimistic mood, so will let everyone die before trying… :D

But I am sure you won’t let me succeed so let the game begin… You can only use, presently possible technology and materials and can assume, that you just need to sustain 10 humans for 20 years for the danger to pass away. I have thought of a possible solution. But will post it later. Enjoy till then…