Barack Obama accepted Nature's invitation to answer 18 science-related questions in writing; John McCain's campaign declined. Obama's answers to many of the questions are printed here; answers to additional questions (on topics including biosecurity, the nuclear weapons laboratories and US participation in international projects) can be found at http://www.nature.com/uselection. Wherever possible, Nature has noted what McCain has said at other times on these topics.
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For more on the US election, see www.nature.com/uselection See Editorial, page 431
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Witze, A. US election: Questioning the candidates. Nature 455, 446–449 (2008). https://doi.org/10.1038/455446a
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DOI: https://doi.org/10.1038/455446a
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