When Kara Martin joined the Marine Corps, her hobbies were sports, drag racing, and working on cars. She didn’t know what her job would be, but an aptitude test placed her as a mechanic.

She was trained to work on aircraft equipment and sent to Afghanistan during Operation Enduring Freedom, the only female mechanic in her squadron. Now, 10 years later, she is Miss December in a World War II throwback pinup calendar to benefit veterans.