Tragedy - Why?

Blogging has been very light here of late - mainly because I have not felt there was much I wanted to blog about but the news this weekend and conversations at work yesterday have brought me out of blogging sabbatical.
The question I heard yesterday in respect of the problems in Somalia, the killing in Norway and the death of Amy Winehouse was why? Some of my colleagues then sprung the where is God in these things and I have to admit I find myself agreeing with them in some senses. it is difficult to argue the concept of a loving God when such things happen and especially when the news seems to be saying the gunman is a 'Christian'.
I have to admit to not knowing the answer and just for a time being like Thomas because I am human and naturally wonder about these things.
Answers on a postcard perhaps?