1.   Allen once worked for a company that tracked his whereabouts electronically.

2.   During the Cold War, senior commanders like Butler studied the personalities of their Soviet counterparts by name and habits, and tracked their whereabouts every day.

3.   High-technology bells and whistles abound, including an electronic communications system that tracks the whereabouts of every staff doctor and nurse.

4.   In early July, just as the FBI felt it had come close to tracking his whereabouts in Italy, Frankel disappeared.

5.   The organizations envisioned that investigators would be able to track the whereabouts of people who are not suspects in an investigation.