The fight against terrorism is leading to the use of more and more invasive technology. Body scanners at airports, CCTV and even monitoring of how we use the internet. Our Science Correspondent David Gregory has been talking to a team of philosophers, who're balancing the impact of this technology with our human rights.

More on the blog: http://www.bbc.co.uk/blogs/davidgregory/2010/03/privacy_philosophy_facebook_an.html