Majestic 12: The Deep State Godfathers of UFO Cover Ups

Has there been a secret government organization named Majestic12 covering up the truth about Extraterrestrials and UFOs for decades? With the public demanding answers and with the coldwar knocking at the door, in the late 1940's President Truman signed an executive order along with a group of alleged secret committee of scientists, military leaders, and government officials, to form a super secret group to facilitate recovery and investigation of alien spacecraft. And thus the Majestic12 was born. But who makes up this group of super elite people and more importantly did they become so powerful that they turned against President John F. Kennedy and even planned his assassination? Also what have they been hiding from the public and are they still trying to remain in control to this day working in the shadows?