MJ-12 and the secret government

In the period from January 1947 to December 1952 was discovered at least 16 crashed or downed extraterrestrial ships, found 65 bodies of aliens and 1 alive. Another alien ship exploded, and since that event nothing has been fixed…. But how to keep everything secret? The government, in cooperation with selected scientists, will convince everyone that nothing like this has actually happened. New projects are being created to filter the information that comes to the surface.