Myrtle Cagle undergoing astronaut testing. Here, she is shown performing the bicycle test at the Lovelace Clinic. Cagle was one of thirteen women that successfully passed these tests, and this group later became known as the Mercury 13.
Myrtle Cagle undergoing astronaut testing. Here, she is shown performing the tilt table test at the Lovelace Clinic. Cagle was one of thirteen women that successfully passed these tests, and this group later became known as the Mercury 13.