PHILADELPHIA – 16-year-old Caitlin Gayles, a student

PHILADELPHIA – 16-year-old Caitlin Gayles, a student athlete for Mount Olive High School in Mount Olive, New Jersey, participates in a Marine Corps pull-up challenge during the Penn Relays at Franklin Field at the University of Pennsylvania campus in Philadelphia, April 26, 2018. Marines partnered with and attended the 124th Penn Relays to foster positive relationships with student athletes and coaches and to educate the track and field community on opportunities within the Marine Corps. This year, the Corps celebrates 100 years of women Marines, a milestone shown in the chance for female Marines to serve in any occupational specialty in the Corps, including all combat specialties. (U.S. Marine Corps photo by LCpl. Naomi Marcom)