FILE - U.S. Rep. John Lewis, D-Ga., center, talks with those gathered, including Ethel Kennedy, center, and Rev. Jesse Jackson, on the historic Edmund Pettus Bridge during the 19th annual reenactment of the "Bloody Sunday" Selma to Montgomery civil rights march across the bridge in Selma, Ala., Sunday, March 4, 2012, 47 years after the historic march that led to the Voting Rights Act. (AP Photo/Kevin Glackmeyer, File)
FILE - Sen. Edward Kennedy, back, stands behind the widow of former Senator Robert F. Kennedy, Mrs. Ethel Kennedy, second left, with her five children, and his wife Joan, right, as they pause at the grave of assassinated President John F. Kennedy in Arlington National Cemetery, Nov. 20, 1970, in Arlington, Va. (AP Photo/Bob Daugherty, File)
FILE - Egyptian human rights attorney and women's rights activist Ragia Omran, center, gets a kiss on the cheek from Robert F. Kennedy Center President Kerry Kennedy, right, accompanied by Ethel Kennedy, left, during the presentation of the RFK Human Rights Award, Nov. 21, 2013, on Capitol Hill in Washington. (AP Photo/Susan Walsh, File)
FILE - Ethel Kennedy, left, subject of the HBO documentary "Ethel," poses for a portrait with her daughter Rory Kennedy, the director of the film, Wednesday, Aug. 1, 2012 in Beverly Hills, Calif. (Photo by Chris Pizzello/Invision/AP, File)
FILE - Ethel Kennedy, left, and her daughter Kerry Kennedy attend the Robert F. Kennedy Ripple of Hope Award ceremony, Tuesday, Dec. 16, 2014, in New York. (AP Photo/Jason DeCrow, File)
FILE - Sen. Robert Kennedy poses with his wife Ethel outside the Senate Chamber on Oct. 13, 1965, in Washington. (AP Photo, File)
FILE - From left, Dolores Huerta, labor leader and civil rights activist, Ethel Kennedy, and civil rights leader Rep. John Lewis, D-Ga., are applauded during the Robert F. Kennedy Human Rights Award ceremony on Capitol Hill in Washington, Tuesday, June 5, 2018. (AP Photo/J. Scott Applewhite, File)
FILE - President Barack Obama awards Ethel Kennedy the Presidential Medal of Freedom, Monday, Nov. 24, 2014, during a ceremony in the East Room of the White House in Washington. (AP Photo/Jacquelyn Martin, File)
FILE - Ethel Kennedy holds hands with grandson Joseph P. Kennedy III, left, while Navy Secretary Ray Mabus chats with her daughter Kathleen Kennedy Townsend, as they pose near a rendering of the Robert F. Kennedy Navy Ship named at the John F. Kennedy Presidential Library, Tuesday, Sept. 20, 2016, in Boston. (AP Photo/Elise Amendola, File)
FILE - Ethel Kennedy, from the film "Ethel," poses for a portrait during the 2012 Sundance Film Festival on Sunday, Jan. 22, 2012, in Park City, Utah. (AP Photo/Victoria Will, File)
FILE - Sen. Edward Kennedy, from left, first lady Hillary Rodham Clinton, President Bill Clinton and Ethel Kennedy, right, listen to a remembrance delivered by Rep. Joseph P. Kennedy II during a memorial Mass in honor of Robert F. Kennedy on the 25th anniversary of his death at the Arlington National Cemetery in Arlington, Va., June 7, 1993. (AP Photo/Marcy Nighswander, File)
FILE - Attorney General Robert F. Kennedy, right, wife Ethel Kennedy, and children, from left, Bobby, Joseph, and Kathleen, second right, pose at Kennedy International Airport in New York, July 1, 1964, shortly after they returned from a one-week trip to West Germany and Poland. (AP Photo/Matty Zimmerman, File)
FILE - Navy Secretary Ray Mabus smiles with Ethel Kennedy, widow of Sen. Robert F. Kennedy, at the naming of the Robert F. Kennedy Navy Ship at the John F. Kennedy Presidential Library, Tuesday, Sept. 20, 2016, in Boston. Ships in this class are being named in honor of civil and human rights heroes. (AP Photo/Elise Amendola, File)
FILE - Ethel Kennedy holds her new son, Douglas Harriman Kennedy, with two-year-old Christopher Kennedy, right, as they leave Georgetown University in Washington, April 13, 1967, for home. (AP Photo/Henry Burroughs, File)
FILE - Ethel Kennedy, widow of Sen. Robert Kennedy, ice skates with youngsters from Bedford Stuyvesant, Brooklyn borough, at the eighth annual Kennedy skating party originated by the late senator at Rockefeller Center's skating rink on Dec. 16, 1972, in New York. (AP Photo, File)