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Elizabeth Vargas 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 )

Elizabeth Vargas attends the U.S. premiere of National Geographic's "Deepsea Challenge 3D", hosted by James Cameron and Rolex, at the American Museum of Natural History on Monday, Aug. 4, 2014 in New York. (Photo by Scott Roth/Invision/AP) ( NY Premiere of "Deepsea Challenge 3D" )

Elizabeth Vargas smiles before a news conference in this Monday, Dec. 5, 2005 file photo, in New York. (AP Photo/Kathy Willens) ( PEOPLE VARGAS )

Elizabeth Vargas, left, and Bob Woodruff pose for a photograph in ABC's "World News Tonight" studio, Monday, Dec. 5, 2005. (AP Photo/Kathy Willens) ( TV ABC NEW ANCHORS )

This photo supplied by ABC shows Grammy-winning singer-songwriter Marc Cohn, right, who survived being shot in the head during what police say was an attempted carjacking in Denver on Aug.7 , being interviewed by ABC News' Elizabeth Vargas, on ABC's "Good Morning America," Friday Aug. 19 2005. Cohn is married to Vargas. (AP Photo/ABC, Ida Mae Astute ) ( PEOPLE CARJACKING SONGWRITER )

Elizabeth Vargas poses in ABC's "World News Tonight" studio, on Dec. 5, 2005, in New York. (AP Photo/Kathy Willens) ( PEOPLE VARGAS )

Elizabeth Vargas arrives at the "Deepsea Challenge 3D" New York Premiere at the American Museum of Natural History on August 4, 2014 in New York City. (Photo by Dave Kotinsky/Getty Images) ( 503426119DK032_Deepsea_Chal )

This photo supplied by ABC shows Elizabeth Vargas and Bob Woodruff, named co-anchors of an expanded version of ABC's "World News Tonight " posing in New York, Monday, Dec. 5, 2005. (AP Photo/ABC,Jeff Neira) ( TV ABC NEW ANCHORS )

In this photo released by ABC News, anchor person Elizabeth Vargas takes a phone call on the set of World News Tonight at ABC News headquarters in New York City, Tuesday, Jan 3, 2006 on her first official day as co-anchor. (AP Photo/ABC, Donna Svennevk) ( TV VARGAS AND WOODRUFF )

In this photo released by ABC News, anchor person Elizabeth Vargas is seated on the set of World News Tonight at ABC News headquarters in New York City, Tuesday, Jan 3, 2006 on her first official day as co-anchor. (AP Photo/ABC, Donna Svennevk) ( TV VARGAS WOODRUFF )

This photo provided by the White House shows President Bush during his interview with ABC News' Elizabeth Vargas at the White House, Tuesday, Feb. 28, 2006. (AP Photo/Eric Draper, White House) ( BUSH ABC )

This is an undated file photo of ABC's Elizabeth Vargas. Vargas. (AP Photo/ABC) ( ABC VARGAS )

Television personality Elizabeth Vargas attends the NY Comedy Festival Event "Stand Up for Heroes: A Benefit for the Bob Woodruff Family Fund", Wednesday, Nov. 7, 2007 at Town Hall in New York. (AP Photo/Evan Agostini) ( Stand Up for Heroes )

This photo provided by the White House shows President Bush with Elizabeth Vargas of ABC News during her visit to the White House,Tuesday, Feb. 28, 2006. (AP Photo/Eric Draper, White House) ( BUSH ABC )

Elizabeth Vargas attends the Broadway opening of "Evita," starring Ricky Martin, at the Marriott Marquis Hotel on Thursday, April 5, 2012, in New York. (AP Photo/Starpix, Amanda Schwab) ( Theater Evita Opening Night )

Elizabeth Vargas attends the premiere for "Les Miserables" at the Ziegfeld Theatre on Monday Dec. 10, 2012 in New York. (Photo by Evan Agostini/Invision/AP) ( Premiere Les Miserables NY )

Singer Marc Cohn and wife Elizabeth Vargas attend the premiere of HBO Films' "Game Change" at the Ziegfeld Theatre on Wednesday, March 7, 2012 in New York. (AP Photo/Evan Agostini) ( Premiere Game Change NY )

Elizabeth Vargas and Marc Cohn attend the premiere of "Promised Land" at AMC Loews Lincoln Square on Tuesday Dec. 4, 2012 in New York. (Photo by Evan Agostini/Invision/AP) ( Premiere Promised Land NY )

This image released by ABC shows actor Tom Hanks during an interview segment with Elizabeth Vargas on "Good Morning America," Friday, Oct. 19, 2012 in New York. (AP Photo/ABC, Fred Lee) ( TV-Tom Hanks-Obscenity )

Elizabeth Vargas attends the New York Film Festival premiere of "All Is Lost" on Tuesday, Oct. 8, 2013 in New York. (Photo by Charles Sykes/Invision/AP) ( 2013 NYFF - "All Is Lost" Screening )

David Weston, President of ABC News, far left, speaks about the network's redesigned evening news broadcast as Elizabeth Vargas, Bob Woodruff, and Jon Banner, from left, join in during the ABC 2006 Winter Press Tour, Saturday, Jan. 21, 2006, in Pasadena, Calif. (AP Photo/Rene Macura) ( TV CRITICS ABC )

David Weston, President of ABC News, far left, speaks about the network's redesigned evening news broadcast as Elizabeth Vargas, Bob Woodruff, and Jon Banner, from left, join in during the ABC 2006 Winter Press Tour, Saturday, Jan. 21, 2006, in Pasadena, Calif. (AP Photo/Rene Macura) ( TV CRITICS ABC )

NEW YORK, NY - DECEMBER 04: Elizabeth Vargas (L) and Marc Cohn attend "Promised Land" premiere at AMC Loews Lincoln Square 13 theater on December 4, 2012 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 157102338CD00016_Promised_L )

NEW YORK, NY - SEPTEMBER 22: Elizabeth Vargas attends the "Hotel Transylvania" New York Premiere at Lighthouse International Theater on September 22, 2012 in New York City. (Photo by Craig Barritt/Getty Images) ( 152639901CB020_Hotel_Transy )

NEW YORK, NY - OCTOBER 13: Elizabeth Vargas and Marc Cohn attend the "Hyde Park On Hudson" Premiere During The 50th New York Film Festival at Alice Tully Hall on October 13, 2012 in New York City. (Photo by Taylor Hill/Getty Images) ( 154001125TH081_Hyde_Park_On )

NEW YORK, NY - JUNE 21: Elizabeth Vargas hosts ABC's "Good Morning America" at Rumsey Playfield on June 21, 2013 in New York City. (Photo by D Dipasupil/Getty Images) ( 170964469DD048_John_Legend_ )

NEW YORK, NY - JUNE 21: Elizabeth Vargas hosts ABC's "Good Morning America" at Rumsey Playfield on June 21, 2013 in New York City. (Photo by D Dipasupil/Getty Images) ( 170964469DD049_John_Legend_ )

PHILADELPHIA, PA - SEPTEMBER 10: Former Secretary of State Hillary Rodham Clinton (C) receives the 2013 Liberty Medal from Jeffrey Rosen, president and CEO of the National Constitution Center as host Elizabeth Vargas applauds September 10, 2013 in Philadelphia, Pennsylvania. Given annually, the medal aims to recognize leadership in the pursuit of freedom. (Photo by William Thomas Cain/Getty Images) ( 171959972WC003_LIBERTY_MEDAL )

Elizabeth Vargas and husband Marc Cohn arrive at the after-party for the special screening of "Charlie's Angels: Full Throttle" at Eyebeam Atelier June 25, 2003 in New York City. (Photo by Evan Agostini/Getty Images) ( 2110350EA069_charlies )

NEW YORK - APRIL 16: "20/20" correspondent Elizabeth Vargas attends a funeral Mass for NBC news correspondent David Bloom at St. Patrick's Cathedral April 16, 2003 in New York City. The 39-year-old anchor of "Weekend Today" died suddenly of a blood clot ( 1936163EA010_bloom )

NEW YORK - MAY 18: News Anchor Elizabeth Vargas and John Stossel attend the ABC Network All-Star Party on May 18, 2004 in New York City. (Photo by Peter Kramer/Getty Images) ( 50847947PK098_abc )

WASHINGTON - SEPTEMBER 13: President of ABC Network Operations, Alex Wallau, and ABC news anchor 20/20 host, Elizabeth Vargas, speak with guests at the National Hispanic Foundation For The Arts Annual 'Noche de Gala" at the Mayflower Hotel, September 13, 2005 in Washington, DC. (Photo by Chris Greenberg/Getty Images) ( 55386933CG0013_nhfa )

WASHINGTON - SEPTEMBER 13: Left to right: Carlos Bernard "24", Eva Longoria "Desperate Housewives", news anchor 20/20 host Elizabeth Vargas, and Jimmy Smits "West Wing", pose together at the National Hispanic Foundation For The Arts Annual 'Noche de Gala" at the Mayflower Hotel, September 13, 2005 in Washington, DC. (Photo by Chris Greenberg/Getty Images) ( 55386933CG008_nhfa )

NEW YORK - MAY 08: TV personality Elizabeth Vargas attends the Time Magazine's celebration of the 100 most influential people on May 8, 2007 in New York City. (Photo by Peter Kramer/Getty Images) ( 74091911PK018_Time_Magazine )

NEW YORK - MAY 27: Elizabeth Vargas poses with Sesame Street Muppets at the 7th annual gala benefiting the Sesame Workshop at Cipriani 42nd Street on May 27, 2009 in New York City. (Photo by Bryan Bedder/Getty Images) ( 57544489 )

NEW YORK - JUNE 09: Vocalist Elly Jackson of La Roux (L) talks with ABC News anchor Elizabeth Vargas and GMA anchor George Stephanopoulos during ABC's "Good Morning America" at ABC Studios on June 9, 2010 in New York City. (Photo by Michael Loccisano/Getty Images) ( 60688560 )

NEW YORK - JUNE 05: Television personality Elizabeth Vargas and son Zachary attend a special screening of "Surf's Up" at the AMC Lincoln Square Theater, June 05, 2007 in New York City. (Photo by Evan Agostini/Getty Images) ( 74386411EA025_Special_Scree )

NEW YORK, NY - NOVEMBER 13: News anchor Elizabeth Vargas attends the "Arthur Christmas" premiere at the Clearview Chelsea Cinemas on November 13, 2011 in New York City. (Photo by Neilson Barnard/Getty Images) ( 132716249NB024_Arthur_Chris )