When you mentioned the plane disappearance it made me think back to Hale Boggs, Cokie Roberts father, and if this was the same plane. Sure enough it is.
Thomas Hale Boggs, Sr. (February 15, 1914 – Undetermined; presumably October 16, 1972) was an American Democratic politician and a member of the United States House of Representatives for Louisiana. He was the House Majority Leader.
In 1972, while he was still Majority Leader, the twin engine airplane in which Boggs was traveling over a remote section of Alaska disappeared. The airplane presumably crashed and was never found. Congressman Nick Begich was also presumed killed in the same accident.
Disappearance and search
As Majority Leader, Boggs often campaigned for others. On October 16, 1972, he was aboard a twin engine Cessna 310 with Representative Nick Begich of Alaska, who was facing a possible tight race in the November 1972 general election against the Republican candidate Don Young, when it disappeared during a flight from Anchorage to Juneau. The only others on board were Begich's aide, Russell Brown, and the pilot, Don Jonz; the four were heading to a campaign fundraiser for Begich. (Begich won the 1972 election posthumously with 56 percent to Young's 44 percent, though Young would win the special election to replace Begich and has won every election to the seat since then.)
In the largest search ever mounted by the U.S. military, Coast Guard, Navy, and Air Force planes searched for the party. On November 24, 1972, after 39 days, the search was abandoned. Neither the wreckage of the plane nor the pilot's and passengers' remains were ever found. The accident prompted Congress to pass a law mandating Emergency Locator Transmitters (ELTs) in all U.S. civil aircraft.
Both Boggs and Begich were re-elected that November. House Resolution 1 of January 3, 1973 officially recognized Boggs's presumed death and opened the way for a special election.
Speculation, suspicions, and theories
The events surrounding Boggs' death have been the subject of much speculation, suspicion, and numerous conspiracy theories. These theories often center on his involvement with the Warren Commission, but some tie his death to alleged corruption charges or his outspoken opposition to powerful Federal Bureau of Investigation director J. Edgar Hoover. Some people, including several of Begich's children, have suggested that Richard Nixon had a hand in Boggs' death in order to thwart the Watergate investigation.
However, none of these theories has ever been proved, and one of Boggs' children (Roberts) has publicly stated that the rumors about Boggs' wanting to reopen the Kennedy assassination case are completely false.
Very interesting..... It would have even more interesting if Mark Begich was running against Young, since that was the Seat his father held.