Why Area 51 is so secured??

Just an assumption,read on......
I think this is the only truth behind area51,well we all know that area 51 is one of the most heavily guarded facilities of the US and this is because the govt. is trying to hide something, something which can put USA in trouble.

Now lets go back to 60's, when US and USSR were engaged in cold war.USSR were far more ahead of the US when it came to arms and space race.In fact USSR space programs were highly successful than those of the US.The only way US could overtake USSR was by sending men to moon first.The bitter truth is that we never went to the moon and it was just a hoax!!.The entire picturisation of the moon landings was done in the deserts of area 51 which were coincidentally covered with craters also few sequences were shot in the hangars.

And the second assumption is that the US military are really using alien technology to enhance their arms resources,
a documentary shown on history channel showed that a guy named bob lazar has worked in area 51 and that too for alien aircrafts.he says that he has seen and operated an alien aircraft.Once he and few of his friends were near the area51 boundaries to see the mysterious lights. but they were spotted by the security guys.The next day lazar was warned by the authorities to never tell anyone about it with an M16 assault rifle aimed on his face,he was fired from work and the next day few men in a car tried to take his life.But he escaped!!!.This probably means that there truly is something extra-terrestrial in that area.