Majestic 12

Majestic 12 (or MJ-12) is a purported organization that appears in UFO conspiracy theories. The organization is claimed to be the code name of an alleged secret committee of scientists, military leaders, and government officials to facilitate recovery and investigation of alien spacecraft.

History
When Lara Croft infiltrates the Area 51 in search of one of the Meteorite Artefacts, specifically Element 115, she comes upon several crates marked with "MJ-12", confirming the existence of the shadowed organization. The Majestic 12 experiments on aliens and their ship.