For Mitchell, who now can use her bionic arm to pick up objects, eat, and dress, her long journey has been worth it.
"People don't know how lucky they are until faced with the difficulties of losing an arm," she said.
The current version of the prosthesis has three motors located within the prosthetic arm that work together to carry out commands.
Future models will use six motors. The goal is to produce more natural movements and allow recipients to perform more complex tasks.
Scientists hope that this technology will eventually lead to even more functional models, including legs through which the person can actually feel where they are walking.
Mitchell is trying to give a little bit back, because she has been given a sort of second chance with her arm.
She currently serves as a mentor for new Marine officers and as an active supporter to other amputees returning from Afghanistan and Iraq.
