Dear Colleagues, For those of you who use the spinoff applications of linear accelerators as a talking point with the media or public, here's a cautionary tale you should be aware of: http://www.nytimes.com/2010/01/27/us/27radiation.html?scp=1&sq=linear%20 accelerator&st=cse and http://www.nytimes.com/2010/01/24/health/24radiation.html?scp=2&sq=linea r%20accelerator&st=cse Sincerely, Norman Graf