"Lt. Cmmdr. Audrey "Mac" MacCallum: My dearest children... well, as this letter will only be used in the event of my death, it may seem somewhat sorrowful, but I don't want you to see it that way, okay? I have always felt that our stay on Earth, the time we call "life", it's a temporary gift to be spent in service of something greater than ourselves. Death comes to us all. It is not to be feared. I loved my job, but I hated war. But the secret mission I undertook every single day, was to protect the two of you from anyone, or anything, that threatened your health and well-being. So promise me you will take care of one another, and, please, leave your lives to the fullest. With all the love in my heart, Mom."