ABC News Reporters

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Dr. Timothy Johnson is the current medical editor/contributor for ABC News. He provides on-air medical ABC’s World News Tonight, Nightline and 20/20. He also appears on Good Morning America. Johnson is on the faculty of Harvard Medical School and on… Read more

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Steve Osunsami is an correspondent for ABC News based in Atlanta. He contributes reports to “World News with Charles Gibson” and other ABC News broadcasts and platforms. Osunsami began his network career at ABC News in April 1997, as a… Read more

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Ron Claiborne is the news anchor for ABC News’ weekend edition of Good Morning America. Claiborne came to ABC News in 1986 and has been a general assignment correspondent based in Boston, reporting for World News Tonight, Nightline and Good… Read more

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Pierre Thomas covers the Justice Department for ABC News. He joined the network in November 2000 and reports for “World News with Charles Gibson,” “Good Morning America,” “Nightline” and other ABC News programs.

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Ned Potter is the science correspondent for ABC News. An ABC News correspondent since July 1987, Mr. Potter came from CBS News, where he was a correspondent in the Chicago and Boston bureaus from 1980 to 1987. His assignments there… Read more

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Mike Von Fremd is an ABC News correspondent based in Dallas. Von Fremd’s recent assignments have included covering the Iraq war from Baghdad and Hurricane Katrina from New Orleans and the Mississippi Gulf Coast. He also reported on the collapse… Read more

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Miguel Marquez is a ABC News Correspondent based in London. Since joining ABC News in May 2005, Marquez has spent several months in Iraq covering the war, politics and the ongoing sectarian violence. He reported from Iraq during one of… Read more

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Martha Raddatz is Chief White House correspondent for ABC News. Raddatz was promoted to her current role in November 2005, after six years with ABC News. Raddatz began her tenure at ABC News in 1999 as the network’s State Department… Read more

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Lisa Stark is a correspondent for ABC News. Lisa was named a correspondent for ABC News in 1994. In her current position she specializes in reporting on federal agencies, covering the Food and Drug Administration, Federal Aviation Administration, National Transportation… Read more

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Kate Snow is a co-presenter of Good Morning America Weekend Edition on ABC. Snow also frequently appears on the weekday Good Morning America and World News with Charles Gibson as a fill-in anchor or correspondent. Snow joined ABC in 2003… Read more

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Jonathan Karl is Senior National Security Correspondent for ABC News. He covers the Pentagon, the intelligence agencies, and the State Department on behalf of “World News With Charles Gibson,” “Nightline,” and “Good Morning America.”

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John McKenzie is medical science correspondent for ABC News based in New York. McKenzie has covered many of the controversies in medicine, from stem cell research to screening for breast and prostate cancer. His reports on cutting-edge technology have included… Read more