Majestic 12, otherwise known short as either Majic12 or MJ-12, was (and still is) a secret organization that was originally founded for handling alien cases.

Following the crash at Roswell (aka the Roswell Incident), MJ-12 was formed as a response to the famous event. Why Majestic 12? I don't know what the "Majestic" has to do with it, but the "12" stands for the twelve alleged members of the group. Included as a member is Vannevar Bush, President Truman's scientific advisor (see Vannevar Bush for more info). However, different sources claim that Majestic 12 was started by Eisenhower instead of Truman. In this case, I'll just stick to both issues. One source names all twelve members of MJ-12, excluding the name of Vannevar Bush. Another source says that he's a member of it. Serial Experiments Lain says Vannevar Bush is part of MJ-12, so most likely the first source would have to be incorrect, but you can never be too sure.

The Founding of MJ-12 (based on first source off of Area-X.co.uk)

1954, President Eisenhower established a permanent committee to be known as Majority Twelve (MJ-12) to "oversee and conduct all covert activities concerned with the alien question." The twelve men chosen to be members are as follows: "Nelson Rockefeller, the director of the CIA Allen Welsh Dulles, the Secretary of State John Foster Dulles, the Secretary of Defense Charles E. Wilson, the Chairman of the Joint Chiefs of Staff Admiral Arthur W. Radford, the Director of the FBI J. Edgar Hoover, and six men from the executive committee of the Council on Foreign Relations known as the 'Wise Men.'"

These "Wise Men" were all members of a secret society of scholars who called themselves "The Jason Society," who recruited their members from the "Skull and Bones," and the "Scroll and Key" societies of Harvard and Yale.

MJ-12 in Relation to the Aliens (based on first source off of Area-X.co.uk)

It is said that President Eisenhower met with the aliens in person, and a formal treaty between the Alien Nation and the United States was signed. "The Treaty stated: The aliens would not interfere in our affairs and we would not interfere in theirs. We would keep their presence on earth a secret. They would furnish us with advanced technology and would help us in our technological development. They would not make any treaty with any other earth nation. They could abduct humans on a limited and periodic basis for the purpose of medical examination and monitoring or our development with the stipulation that the humans would not be harmed, would be returned to their point of abduction, that the humans would have no memory of the event, and that the alien nation would furnish MJ-12 a list of all human contacts and abductees on a regularly scheduled basis."

By 1955, the aliens had deceived Eisenhower and had broken the treaty. Mutilated humans and animals were found all across the United States. It was also suspected that the aliens were not submitting a complete list of human contacts and abductees to MJ-12, as well as the suspicion that not all abductees had been returned.

Contingency Plan

A contingency was created by MJ-12 to throw "everyone off the trail should they come close to the truth." This plan, MAJESTIC TWELVE, was the release of a false document entitled the "Eisenhower Briefing Document." The document lists the Executive Order as #092447, a number which does not exist and will not exist for a long period of time.

Majestic 12 Today

MJ-12 still exists to this very day, and continues to operate like it always has. It is still made up of the same structure, six from the same positions in the government, and six from the executive members of the Council on Foreign Relations and/or Trilateral Commission.