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Diane Sawyer (C) attends the 12th annual Sesame Workshop Benefit Gala at Cipriani 42nd Street on May 28, 2014 in New York City. (Photo by Robin Marchant/Getty Images) ( 493368579RM002_12th_Annual_ )

(L-R) Bob Iger, chairman and CEO of The Walt Disney Company; Anne Sweeney, Co-chair, Disney Media Networks and President, Disney/ABC Television Group; ABC News anchor Diane Sawyer; Barbara Walters; ABC News anchor David Muir, ABC 'Good Morning America' anchor Robin Roberts and ABC 'Good Morning America' anchor George Stephanopoulos attend the dedication ceremony as ABC News headquarters in New York is proclaimed 'The Barbara Walters Building' ABC News Headquarters Dedication Ceremony on May 12, 2014 in New York City. (Photo by Slaven Vlasic/Getty Images) ( 489379217SV026_ABC_News_Hea )

Diane Sawyer (L) and Jeff Smisek attend the Yahoo News/ABCNews Pre-White House Correspondents' dinner reception pre-party at Washington Hilton on May 3, 2014 in Washington, DC. (Photo by Andrew H. Walker/Getty Images for Yahoo News) ( 488128989KS00080_Yahoo_News )

Diane Sawyer attends A Celebration of Barbara Walters Cocktail Reception Red Carpet at the Four Seasons Restaurant on May 14, 2014 in New York City. (Photo by D Dipasupil/Getty Images) ( 490660973DD101_A_Celebratio )

ABC News anchor Diane Sawyer (L) and Barbara Walters attend the dedication ceremony as ABC News headquarters in New York is proclaimed "The Barbara Walters Building" ABC News Headquarters Dedication Ceremony on May 12, 2014 in New York City. (Photo by Slaven Vlasic/Getty Images) ( 489379217SV013_ABC_NEWS_HEA )

In this May 3, 2010 file photo, ABC News anchor Diane Sawyer arrives to the Metropolitan Museum of Art Costume Institute gala in New York. (AP Photo/Peter Kramer, file) ( TV ABC News China )

Diane Sawyer, right, appears with Oprah Winfrey during a star-studded double-taping of "Surprise Oprah! A Farewell Spectacular," Tuesday, May 17, 2011, in Chicago. (AP Photo/Charles Rex Arbogast) ( Winfrey Chicago Show )

Diane Sawyer in New York City, circa 1960-1970s. (AP Photo/Eddie Adams) ( Diane Sawyer )

ABC News' Diane Sawyer, left, and Katie Couric, flank ABC News President Ben Sherwood, background left, and Ross Levinsohn, background right, Yahoo's Executive Vice President of Americas, during a news conference in New York, Monday, Oct. 3, 2011. (AP Photo/Richard Drew) ( Yahoo ABC )

Television news anchor Diane Sawyer gestures to the crowd after receiving an honorary Doctor of Letters degree from Brown University during the university's 244th commencement exercises, Sunday, May 27, 2012, in Providence, R.I. (AP Photo/Stew Milne) ( Brown Commencement )

In this undated publicity image released by ABC, Diane Sawyer anchor of "World News with Diane Sawyer, is shown on the set in New York. (AP Photo/ABC, Ida Mae Astute) ( TV ABC News Cutbacks )

Director Mike Nichols, left, and his wife, journalist Diane Sawyer, right, attend the premiere of "Frances Ha" on Thursday, May 9, 2013 in New York. (Photo by Andy Kropa/Invision/AP) ( Frances Ha Premiere NY )

Diane Sawyer attends A Celebration of Barbara Walters at the Four Seasons Restaurant on Wednesday, May 14, 2014 in New York. (Photo by Charles Sykes/Invision/AP) ( A Celebration of Barbara Walters )

In this image released by ABC, Diane Sawyer, co-anchor of the early morning news show, "Good Morning America," is shown with co-anchor Robin Roberts on Sawyer's last day on the program, Friday, Dec. 11, 2009 in New York. Sawyer will take over the "World News" anchor chair on Dec. 21, succeeding Charles Gibson, who will retire on Dec. 18. (AP Photo/ABC, Ida Mae Astute) ( People Diane Sawyer )

Director Mike Nichols, left, and Diane Sawyer arrive for the funeral of actor Philip Seymour Hoffman at the Church of St. Ignatius Loyola, Friday, Feb. 7, 2014 in New York. Hoffman, 46, was found dead Sunday of an apparent heroin overdose. (AP Photo/Mark Lennihan) ( Hoffman Funeral )

This photo released by ABC shows Diane Sawyer, left, and George Stephanopoulos during election night coverage early Wednesday, Nov. 7, 2012, from ABC News' Times Square Studios in New York. (AP Photo/ABC, Donna Svennevik) ( Election Media )

In this March 24, 2012 photo, Diane Sawyer attends Aretha Franklin's seventieth birthday party in New York. Sawyer’s Election Night performance left some viewers asking if she had begun celebrating Tuesday's election a bit early. (AP Photo/Charles Sykes, File) ( TV-Diane Sawyer )

Diane Sawyer attends "A Celebration of Barbara Walters" at The Four Seasons Restaurant on Wednesday, May 14, 2014 in New York. (Photo by Charles Sykes/Invision/AP) ( A Celebration of Barbara Walters )

"Good Morning America" co-host Diane Sawyer arrives for Walter Cronkite's funeral at St. Bartholomew's Church on Park Ave. in New York, Thursday, July 23, 2009. Cronkite died last Friday at his Manhattan home at age 92. (AP Photo/Kathy Willens) ( CRONKITE FUNERAL )

From left, television executive Grant Tinker, journalist Diane Sawyer, the late Quinn Martin's widow Mrs. Stewart Bowie, and writer/directors Garry Marshall and James L. Brooks pose together at the Academy of Television Arts & Sciences' 13th Annual Hall of Fame induction ceremonies, Saturday, Nov. 1, 1997, in the North Hollywood section of Los Angeles. All of those pictured were inducted into the Hall of Fame, except for Bowie, who was accepting for her late husband, producer Quinn Martin. (AP Photo/Chris Pizzello) ( TV HALL OF FAME )

File - New ABC World News anchor Diane Sawyer tapes a news brief before her live evening broadcast from New York on Monday, Dec. 21, 2009. (AP Photo/ABC, Ida Mae Astute) ( TV Sawyer Debut )

Journalist Diane Sawyer and director Mike Nichols arrive at the AFI Lifetime Achievement Awards honoring Nichols, presented by TV Land at Sony Pictures Studios on Thursday, June 10, 2010 in Culver City, Calif. (AP Photo/Chris Pizzello) ( AFI Honors Mike Nichols )

ABC's "Good Morning America" anchors Diane Sawyer, left, Charles Gibson, center, and former anchor Joan Lunden, arrive at Good Morning America's 30th anniversary cocktail party at Lincoln Center in New York Tuesday, Oct. 25, 2005. (AP Photo/Shiho Fukada). ( GMA 30TH ANNIVERSARY )

Diane Sawyer, anchor of ABC World News, speaks at Women's Conference Tuesday, Oct. 26, 2010, in Long Beach, Calif. (AP Photo/Jae C. Hong) ( Womens Conference )

Diane Sawyer in New York City, circa 1960-1970s. (AP Photo/Eddie Adams) ( Diane Sawyer )

FILE - In this July 9, 2009 file photo, Diane Sawyer attends the premiere of "Harry Potter and the Half Blood Prince", in New York. (AP Photo/Peter Kramer, file) ( ABC Gibson )

Journalist Diane Sawyer arrives at the AFI Lifetime Achievement Awards honoring Mike Nichols, presented by TV Land at Sony Pictures Studios on Thursday, June 10, 2010 in Culver City, Calif. (AP Photo/Chris Pizzello) ( AFI Honors Mike Nichols )

From left, Diane Sawyer, the honorable Ruth Bader Ginsburg and the honorable Sandra Day O’Connor, are seen on stage at the Women's Conference Tuesday, Oct. 26, 2010, in Long Beach, Calif. (AP Photo/Jae C. Hong) ( Womens Conference )

Diane Sawyer, anchor of ABC World News, speaks at Women's Conference Tuesday, Oct. 26, 2010, in Long Beach, Calif. (AP Photo/Jae C. Hong) ( Womens Conference )

Diane Sawyer in New York City, circa 1960-1970s. (AP Photo/Eddie Adams) ( Diane Sawyer )

Diane Sawyer attends Aretha Franklin's seventieth birthday party in New York, Saturday, March 24, 2012. (AP Photo/Charles Sykes) ( Aretha Franklin Birthday Party )

Republican vice presidential nominee, Rep. Paul Ryan is interviewed by television anchor Diane Sawyer before the Republican National Convention in Tampa, Fla., on Thursday, Aug. 30, 2012. (AP Photo/Lynne Sladky) ( Republican Convention )

This April 9, 2013 photo released by ABC shows Amanda Knox, left, speaking during an interview with ABC News' Diane Sawyer in New York. Last month, Italy's highest criminal court overturned her acquittal in the 2007 slaying of British student Meredith Kercher and ordered a new trial. The interview will air on Tuesday, April 30, coinciding with the release of her memoir, "Waiting to Be Heard." (AP Photo/ABC, Ida Mae Astute) ( Knox Interview )

Newscaster Diane Sawyer during a tour of the site of the upcoming Democratic National Convention in Denver, Sunday, Aug. 24, 2008. (AP Photo/Charlie Neibergall) ( Democratic Convention )

Newscaster Diane Sawyer during a tour of the site of the upcoming Democratic National Convention in Denver, Sunday, Aug. 24, 2008. (AP Photo/Charlie Neibergall) ( Democratic Convention )

(L-R) Journalist Diane Sawyer, President, EGPAF Board of Trustees Willow Bay and Global Impact Award Recipient Hillary Rodham Clinton speak on stage during Elizabeth Glaser Pediatric AIDS Foundation's Global Impact Award Gala Dinner Honoring Hillary Clinton at Best Buy Theater on December 3, 2013 in New York City. (Photo by Cindy Ord/Getty Images for Elizabeth Glaser Pediatric AIDS Foundation) ( 451628359CO00136_Elizabeth_ )

(L-R) ABC News anchor Diane Sawyer; ABC News anchor David Muir and ABC 'Good Morning America' anchor Robin Roberts attend the dedication ceremony as ABC News headquarters in New York is proclaimed 'The Barbara Walters Building' ABC News Headquarters Dedication Ceremony on May 12, 2014 in New York City. (Photo by Slaven Vlasic/Getty Images) ( 489379217SV033_ABC_News_Hea )

ABC's Good Morning America co-anchor Diane Sawyer, left, speaks with Janet Jackson in New York's Battery Park during a live television concert on Wednesday, March 31, 2004. This was Jackson's first television performance since her controversial Super Bowl appearance earlier this year. (AP Photo/Stuart Ramson)

ABC's "Good Morning America" anchors Robin Roberts, left, Charles Gibson, second from left, Diane Sawyer, second from right, and Tony Perkins, arrive at Good Morning America's 30th anniversary cocktail party at Lincoln Center in New York Tuesday, Oct. 25, 2005. (AP Photo/Shiho Fukada). ( GMA 30TH ANNIVERSARY )

Diane Sawyer, 17, Louisville, is shown being crowned Kentucky?s Junior Miss after she defeated 18 other girls in the competition at Louisville Saturday, Feb. 4, 1963. Stanley Craig of Owensboro, the 1962 winner, is doing the honors. Miss Sawyer will represent the state in the national Junior Miss contest at Mobile, Alabama in March. (AP Photo/CJ) ( Junior Miss Diane Sawyer and Stanley Craig )

Television journalist Diane Sawyer and her husband, film director Mike Nichols, pose together at the Academy of Television Arts & Sciences' 13th Annual Hall of Fame induction ceremonies, Saturday, Nov. 1, 1997, in the North Hollywood section of Los Angeles. Sawyer was given a Hall of Fame award along with writer/directors James L. Brooks and Garry Marshall, television executive Grant Tinker and the late producer Quinn Martin. (AP Photo/Chris Pizzello) ( TV HALL OF FAME )

"Good Morning America" co-host Diane Sawyer flashes a smile onstage during the show's 30th birthday celebration outside the ABC studios in New York's Times Square Thursday, Nov. 3, 2005. (AP Photo/Jason DeCrow) ( GMA 30TH BIRTHDAY )

Diane Sawyer, 17, America's Junior Miss of 1963, takes a few snap shots of New York's skyline on March 18, 1963. She is the daughter of Mr. and Mrs. E.P. Sawyer of Louisville, Ky. (AP Photo) ( NYC DIANE SAWYER )

Diane Sawyer,left, and her husband Mike Nichols, arrive at the 8th Annual American Comedy Awards in Los Angeles, Sunday, March 6, 1994. Nichols was given the Lifetime Creative Achievement Award. (AP Photo/Lois Bernstein) ( Mike Nichols and Diane Sawyer )

Director-producer Mike Nichols, left, is shown with his wife, news broadcaster Diane Sawyer, as they arrive at the premiere of his new movie, "Regarding Henry," in New York City, June 25, 1991. (AP Photo/Luiz C. Ribeiro) ( NICHOLS SAWYER )

Newlyweds Diane Sawyer, CBS-TV correspondent, and director Mike Nichols hold hands as they leave the opening of the Nichols-directed production "Waiting for Godot," by playwright Samuel Beckett, at Lincoln Center in New York, on November 6, 1988. (AP Photo/Ed Bailey) ( SAWYER NICHOLS LINCOLN CENTER )

Hillary Rodham Clinton, recalling Diane Sawyer's singing voice from the days she and the television journalist were classmates at Wellesley College, gets a laugh while they posed for a photo session in New York, Nov. 9, 1993. The first lady addressed the Business Enterprise Awards breakfast, a gathering including 200 of the nation's most prominent leaders. (AP Photo/Richard Drew) ( MRS. CLINTON AWARDS )

Country singer Kenny Chesney, right, plants a kiss on the cheek of "Good Morning America" co-host Diane Sawyer after performing on the show outside the ABC television studios in New York's Times Square Monday, Nov. 7, 2005. (AP Photo/Jason DeCrow) ( MUSIC CHESNEY )

Co-anchors Diane Sawyer, left, and Barbara Walters of ABC-TV's "Turning Point" get together at a news conference in New York City, Tuesday, March 8, 1994. (AP Photo/Monika Graff) ( SAWYER WALTERS )

Television newswoman Diane Sawyer is shown in 1990 photo. (AP Photo) ( Diane Sawyer )