In July 1943, Dr. Vannevar Bush appointed Albert Einstein to a shadowy committee. “Neither the exact nature of this ‘committee’ nor the skills involved have ever been disclosed.” 
Vannevar Bush was a member of the Majestic-12 Committee. Another member was James Forrestal. Forrestal was “suicided” in 1949. In 1941, Forrestal had raced through the corridors of the Pentagon screaming, “We’re being invaded and we can’t stop them!”
Albert Einstein appointed by Vannevar Bush to Majestic-12? I have identified Majestic-12 as an outgrowth of the Manhattan Project. (Background: Our Friend, The Ether (Part 9), Ersjdamoo’s Blog entry of October 29, 2013.)
A conflict between Forrestal and the Air Force “was probably the foremost cause” of his “mental breakdown” and alleged “suicide.” 
In 1943, a rumored “Philadelphia Experiment” is said to have opened a portal into another dimension which caused the U.S. government to achieve contact with an “alien civilization.”  James Forrestal runs down the corridors of the Pentagon screaming, “We’re being invaded and we can’t stop them!” Connect the dots.
Victor Silverman claimed he had been onboard the USS Eldridge at the time of the “Philadelphia Experiment.” Before the actual experiment, during the preparation phase, Silverman had noticed a civilian aboard DE-173, the USS Eldridge. “That guy could use a haircut,” commented Silverman to a shipmate. Later, Silverman was amazed to discover that the shaggy civilian had been none other than Albert Einstein! 
Years before, when Einstein had abandoned The Ether, this had caused complications as to how to explain the electro-magnetic field and the force of gravity. Even after “Majestic” Einstein had backtracked and allowed a “new ether”, still there was a difficulty of “unifying” the gravity field and the electro-magnetic field. In 1925, “Einstein was convinced that he had found a final and satisfying solution to the problem.” The official version is that Einstein “abandoned” this solution but years later “returned” to it.  However the version told by “Philadelphia Experiment” proponents is that Einstein had in fact solved the problem but suppressed this due to “Humantics.” Later, circa 1940, because Einstein detested the Nazis, the “Unified Field Theory” is said to have been quietly revived.
In abandoning The Ether, Albert Einstein became a sort of “atheist of The Ether.” But Einstein’s Ether atheism lasted only 11 years: 1905 – 1916. The Ether blasphemy began in 1905, with Einstein’s Special Theory of Relativity. There was no “absolute rest” anywhere in the universe, suggested Einstein. “Absolute rest”, key attribute of The Ether, was beyond any experimental test. And so, adhering to the positivist beliefs – if it can’t be measured it doesn’t exist – Einstein (temporarily) rejected The Ether. 
But Philipp Lenard, a Nobel Prize winner who defended The Ether until the end of his days, was not impressed by “relativity.” The relativity principle was old news, having been written about by Galileo (1564 – 1642), Lenard pointed out. 
——- Sources ——-
 The Philadelphia Experiment, by William L. Moore (with Charles Berlitz). New York: Fawcett Crest, 1979.
 “Members of the Majestic-12 Committee”. http://www.bibliotecapleyades.net/sociopolitica/esp_sociopol_mj12_21a.htm
 Einstein and the Ether, by Ludwik Kostro. Montreal: Apeiron, 2000