If I see a ufo with my own eyes then I'll be convinced but people like this guy can't be taken seriously. He hasn't even seen a ufo and yet he thinks the UK should build a defense system against things we know nothing about in the extremely unlikely event of an alien invasion. Lol
perhaps he thinks dr who and torchwood are real ;)
i dont recall a chuffing huge space ship over london a few christmas' back nor a giant titanic almost hitting london (again always london) so i dont think we really need some space gun to shoot down a possible friendly ET
as for ufo's its always assumed to be alien the u stands for unidentified which could be anything if you dont know what it is
afaik no one had seen a horse in america till it was imported, so imagine being a native of north or south america and seeing some bloke in armour sat astride one, what the hell would you think it was
A> some human like yourself wearing funny stuff on some strange animal
B> some bloody strange animal with two heads
and then someone with a gun might be seen as his hand firing deadly mojo not a hand held weapon
take a harly down the amazon and it will seem alien but only in a cultural sence