This has been a week of contrasts, in which we wonder if we humans can really be that awful.
In the words of one person...
"On the one hand you've got people here who are working to alleviate poverty and to help rid the world of the pandemic of Aids. They're working on ways to have a clean environment.
"And on the other hand you have people killing innocent people.
"The contrast couldn't be clearer between the intentions and the hearts of those of us who care deeply about human rights and human liberty, and those who kill."
I'd never thought I'd post a quote by George W Bush to my blog, but for once he's right.