The most stressful part of the U.S. DoS Language Services jobs commitment was (and still is) time zone change (Pacific to Atlantic) as the assignments start in D.C.and a Californian wakes up three hours ahead of his habitual time the next morning... That is orchestrated by hops from one time zone to another in the course of the program (occasionally it may be back to Pacific time zone several days into the program and then - back to some place in the East again... wherever the program plan might take you). The people in the group (visitors from Russian-speaking areas) might have nerves and occasional temper flares (the tempers normally tend to show towards the conclusion of interpreting assignments as visitors get increasingly homesick).