Retrospectives on Intern

perspectives on international collaboration in high energy physics: • Gordon Fraser highlights the origins of panEuropean cooperation at CERN and DESY. • Hirotaka Sugawara frankly appraises the Japanese experience and plans for future colliders. • Alexander Skrinsky reviews the increasing reliance on international exchanges in the Russian program. • Zhou Guangzhao explains how international collaboration has been the key to China’s emergence as a prominent contributor to the field. Taken together, these articles show how international collaboration has increasingly knit the community together. It has indeed become, in Peter Rosen’s apt phrase, “the sine qua non of high energy physics.” All four articles begin on these two pages, 12 and 13. Then they continue as separate columns on pairs of facing pages through page 19 (look for the relevant author’s picture at the top of each column).