Presidential hopefuls Rep. Michele Bachmann (R-MN), who signed a pledge against abortion rights, and businessman Herman Cain, who has not, seen at the taping of a radio show in New Hampshire in May. Jim Cole/AP hide caption
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(March 29, 2011 file photo from Chicago): Controversial anti-abortion billboards depicting President Obama. They were sponsored by ThatsAbortion.com. Scott Olson/Getty Images hide caption
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A genetically engineered AquAdvantage salmon looms behind an Atlantic salmon sibling of the same age. Courtesy of AquaBounty Technologies hide caption
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Stewart Schwartz of Laurel, Md., attends a rally opposing federal funding for Planned Parenthood on Capitol Hill on April 7, 2011. Brendan Hoffman/Getty Images hide caption