The truth is we in fact have been visited by aliens on multiple occasions with meet and greet sessions to wide eyed spectators in Russia and Zimbabwe in the last few decades. In total over a hundred witnesses have reported mass encounters which include communication and physical interaction. Both cases report a ship landing and aliens emerging from the saucer shaped craft. Both encounters were different species. Both encounters had many dozens of witnesses from many people. In Russia it was reported by young and old rich and poor, even scientists confirmed this happened and was reported my many major news outlets including a documentary of the event in which many drew pictures of what they saw. With soil samples taken at the scene shows high powered electromagnetic radiation and psychologists deem all witnesses to be telling the truth. This includes the Russian government. This represents about as detailed and thorough as an investigation of this type can get and has been deemed true by the Russian science community Government and the people of the city of Voronezh. But many in the States have continued to disregard these events simply because they were done on foreign soil and its too difficult to trust scientists in other countries. http://time.com/3475954/voronezh-ufo-report-1989/