About 75 people arrived at the entrance to the once-secret Area 51 military site in the American state of Nevada early Friday to storm the base to see creatures from outer space. Law enforcement officers detained at least two of the people. In June, a post inviting people to storm the site appeared on the internet. Millions of people saw the message. The “Storm Area 51” invitation led to musical performances and other events in Rachel and Hiko, two small towns near the base. Lincoln County Sheriff Kerry Lee estimated late Thursday that about 1,500 people had gathered for the events. Lee said more than 150 people traveled several additional kilometers down dirt roads to get within selfie distance of the base.