Cigarette packs could soon carry distrurbing pictures of cancer-ravaged organs. A new study shows smokers have become immune to current warnings on packets and calls for a radical re-think. It could lead to the use of images pictures of damaged hearts and lungs to push home the 'smoking kills' message. Experts at the Cancer Research UK Centre for Tobacco Control Research in Scotland led the European-wide investigation. Interviews were conducted with 56 focus groups in Finland, France, Germany, Greece, Spain and Sweden. Participants looked at pre-2001 "small" warnings on cigarette packs and current large "black and white" warnings. The results...