After a career in different applications of Physics, including some 30 years in the detection of CWA, Explosives, Drugs, Weapons etc threat types I retired and formed my own company MBC Ltd. Retirement for me involves trying to assist people in understanding the problems in detecting different threats and strengths/limitations of different technologies: there are too many ‘snake oil’ salesmen who will promise the world: but it can be people’s lives that are lost when the ‘promise’ fails as the right questions were not asked at the start.