![](https://www.afhistory.org/wp-content/uploads/2023/11/Nov-28-1961.jpg)
Enos was selected for his Project Mercury flight only three days before launch. Two months prior, NASA launched Mercury-Atlas 4 on September 13, 1961, to conduct an identical mission with a “crewman simulator” on board. Enos flew into space aboard Mercury-Atlas 5 and completed his first orbit in 1 hour and 28.5 minutes.