CERN is the largest scientific instrument in the world, and it’s a collaboration between the European nations which funded it, and a global collaboration of researchers and instrument builders from  many nations: the US, Japan, the Russian Federation, China, and many more - an example of how science transcends borders. (Listen for Andres’ wonderful story of how WW2-era Russian naval guns were melted down to provide a special kind of brass needed for one detector.) So it’s appropriate that this last audio podcast gives voice to four researchers: CERN Director-General Fabiola Gianotti (Italy); theorist Dorota Grabowska (USA); Andres Delannoy (USA/Puerto Rico) and Andre David (Portugal.) Thanks to all of them, and CERN media rep Sarah Charley, and all others who welcomed us to this unique and amazing facility.