The American Association for the Advancement of Science (AAAS) offers a 10-week summer fellowship program to place advanced students in the natural and social sciences at radio stations, television stations, newspapers and magazines. The fellowship provides an opportunity to observe and participate in the process by which science news is reported. The website is http://ehr.aaas.org/ehr
(click the "Projects" link). An application form can be downloaded from that site.