The Brothers Kennedy

The Kennedys pose for a family portrait in 1930. From left: Eunice, Jean, Rosemary, Robert, Edward, Joseph Sr., John, Rose, Pat, Kathleen and Joe Jr. — AP

The Kennedys pose for a family portrait in 1930. From left, Eunice, Jean, Rosemary, Robert, Edward, Joseph Sr., John, Rose, Patricia, Kathleen and Joe Jr.

Edward Kennedy and his big brother, Joe, hang out in Palm Beach, Fla., Dec. 1939/Jan. 1940. — JFK Library Foundation

Edward Kennedy and his big brother, Joe, hang out in Palm Beach, Fla., in December 1939.

John F. Kennedy and brother Edward M. Kennedy aboard "Victura", Hyannis Port, Mass., circa 1946. — JFK Presidential Library & Museum

Edward M. Kennedy, left, and John F. Kennedy get ready for a sail aboard "Victura" in Hyannis Port, Mass. in 1946.

Brothers John, Robert and Edward Kennedy at Palm Beach, Fla., April 1936. — John F. Kennedy Library

Kennedy brothers, from left, John, Robert and Edward pose in Hyannisport in 1948.

The Kennedy Family in Hyannis Port, 1948. From left: John F. Kennedy, Jean Kennedy, Rose Kennedy, Joseph P. Kennedy Sr., Patricia Kennedy, Robert F. Kennedy, Eunice Kennedy, and Edward M. Kennedy (kneeling). Photograph in the John F. Kennedy Presidential — JFK Presidential Library & Museum

The Kennedy Family in Hyannis Port, Mass., in 1948. From left: John F. Kennedy, Jean Kennedy, Rose Kennedy, Joseph P. Kennedy Sr., Patricia Kennedy, Robert F. Kennedy, Eunice Kennedy, and Edward M. Kennedy (kneeling).

Robert, John, and Edward Kennedy walk in the surf at Palm Beach, Fla., April 1957.

Edward Kennedy, left, then a student at the University of Virginia, attends the 1958 Gridiron Club dinner in Washington, D.C., with brothers John F. Kennedy, then a senator from Massachusetts and Robert F. Kennedy, then chief counsel to the Senate Rackets — AP

Edward Kennedy, left, then a student at the University of Virginia, attends the 1958 Gridiron Club dinner in Washington, D.C., with brothers Sen. John F. Kennedy, and Robert F. Kennedy, then chief counsel to the Senate Rackets Committee.

Brothers John F. Kennedy, Robert F. Kennedy, and Edward M. Kennedy in Hyannis Port, Cape Cod, Massachusetts, 1960. — JFK Presidential Library & Museum

Brothers John, Robert and Edward Kennedy were all smiles posing for a photo in Hyannis Port, Mass., in 1960.

President Kennedy and his brothers, Attorney General Robert F. Kennedy and Senator Edward M. Kennedy. White House, outside Oval Office. Aug. 28, 1963. — AP Photo

President John F. Kennedy, right, and his brothers, Attorney General Robert F. Kennedy, left, and Sen. Edward M. Kennedy, stand outside the Oval Office Aug. 28, 1963, in Washington D.C.

President John F. Kennedy and brother Senator Edward M. Kennedy at a Democratic Party Fundraiser -- "New England's Salute to the President" -- at the Boston Armory, Boston, Massachusetts on Oct. 19, 1963. — Cecil Stoughton, White House

President John F. Kennedy, center, applauds his brother, Sen. Edward M. Kennedy, right, following a speech given at the Democratic Party fundraiser, "New England's Salute to the President," at the Boston Armory in Boston, Mass., Oct. 19, 1963.