People walk near a gate to Area 51 as an influx of tourists responding to a call to 'storm' Area 51, a secretive U.S. military base believed by UFO enthusiasts to hold government secrets about extra-terrestrials, is expected in Rachel, Nevada, U.S. September 20, 2019. Alien enthusiasts sparred with guards during a late night party outside the gates of Area 51. REUTERS/Jim Urquhart

Two men dance on a road to an entrance to Area 51 as an influx of tourists responding to a call to 'storm' Area 51, a secretive U.S. military base believed by UFO enthusiasts to hold government secrets about extra-terrestrials, is expected in Rachel, Nevada, U.S. September 20, 2019. REUTERS/Jim Urquhart

An attendee wears an alien mask at the gate of Area 51 as an influx of tourists responding to a call to 'storm' Area 51, a secretive U.S. military base believed by UFO enthusiasts to hold government secrets about extra-terrestrials, is expected in Rachel, Nevada, U.S. September 20, 2019. REUTERS/Jim Urquhart

Children run towards an entrance to Area 51 as an influx of tourists responding to a call to 'storm' Area 51, a secretive U.S. military base believed by UFO enthusiasts to hold government secrets about extra-terrestrials, is expected in Rachel, Nevada, U.S. September 20, 2019. REUTERS/Jim Urquhart

A person looks at their phone at a gate to Area 51 as an influx of tourists responding to a call to 'storm' Area 51, a secretive U.S. military base believed by UFO enthusiasts to hold government secrets about extra-terrestrials, is expected in Rachel, Nevada, U.S. September 20, 2019. REUTERS/Jim Urquhart

A woman carries a sign outside a gate to Area 51 as an influx of tourists responding to a call to 'storm' Area 51, a secretive U.S. military base believed by UFO enthusiasts to hold government secrets about extra-terrestrials, is expected in Rachel, Nevada, U.S. September 20, 2019. REUTERS/Jim Urquhart