"Do not speak," I instructed her. "If you speak, I will gag you. Nod if you understand."I could see her struggling heroically to control herself - sh... was genuinely scared, which is what I wanted, but she also knew I would not harm her. She nodded, her shoulders trembling a little as she began to shake."Good. You will not be harmed as long as you obey," I said as I backed out of my parking space.I was not worried about her figuring out where we were going during the drive. My carefully chosen. I see by our caller ID that the number you are calling from is a cell number. Can you be reached at this number later today or early tomorrow?Caller: Yes. I am safe for the next 3 days at least.TSI: One of our services personnel will be contacting you either later on today or before noon tomorrow. Then you can review with them your needs and possible solutions.Caller: Thank you.Sunday mid-morning.TSI: Good morning. This is Terminations Services Inc. calling.Caller: I was afraid that you weren't. They always dressed similarly, if not identically. They were used to being gawked at, but when asked they said that although they enjoyed being at the center of attention, they didn't mind sharing the spotlight with their sister. To them, it was the perfect balance.It was during a lab for a particularly challenging computer science course that the two sisters met Keith. He was a computer science major and helped the two girls with their lab project. Though he was a self-admitted geek, he was. ..(Dr. Stoppard is interrupted at that point by a heckler from the crowd. The woman's words are unintelligible over the mike, but he replies to what is said.)"I don't mean to give offense by using the word 'mules.' Different people have different preferences for what they choose to call this group and I can't think of a single term that doesn't offend someone, but it is the term I have heard used most commonly to self-identify. If some people use it in a derogatory fashion, it's everyone's.