American Association for the Advancement of Science (AAAS) Mass Media Fellows
Supports currently-enrolled or recently-graduated science, math, and engineering students for 10 weeks of summer work with mass media organizations. Fellows collaborate with journalists to help make science news comprehensible to the general public. There does not seem to be a citizenship requirement–contact the organization to be sure. Only students enrolled in graduate school, graduating seniors of undergraduate institutions, or alumni who have graduated early in the fall semester may apply (the fellowship must be completed within one year of graduation).