A deadly weapon and an economic cornerstone, the impact of a bullet spreads far and wide. In this documentary BBC Defence Correspondent Caroline Wyatt takes an extraordinary journey through the defence industry as she tracks the fate of a bullet. From manufacture to gun barrel, Caroline tracks her bullet from the docks where the explosive propellant are imported, through the Cheshire factory where it is machined, to testing and out to its final destination - war. With its deep historical roots, its reliance of raw materials from all over the world and its central role in the economy this most basic of military equipment involves a huge cross-section of British society, all working for a war effort that sees millions of rounds produced every week of the year. By the time she sees the shot fired, Caroline will have met the huge variety of people employed in its creation. As she tracks the bullet's journey, Caroline will ask what would happen to our economy if peace bloomed in Iraq and Afghanistan, and how people feel about making products that are designed to kill. Link to the BBC Radio 4 programme.