Do you think that aliens exist or do you think its a idea created by the US navy to hide their research?

I believe that after the so called "alien interview/autopsy" videos i believe in a bid to hide their advancements and draw attention away from their new projects the navy is distracting the world by sending out people with UFO 'evidence'.The sighting are reported in area 51 where all the new planes are made and tested and if they made all this research public they would draw attention from Russia.