Ex-Russian President Dmitry Medvedev (serving as Prime Minister at the time) was asked by a reporter in 2012 if aliens had ever visited Earth

 https://www.reddit.com/r/UFOB/comments/1t0mvel/exrussian_president_dmitry_medvedev_serving_as/ 

https://www.reddit.com/r/UFOB/comments/1pzx09x/why_ufo_truth_is_indigestible_and_too_terrible_to/ 

https://www.reddit.com/r/UFOB/comments/1q3dud3/the_missing_link_in_ufology_they_edit_our/