The "Sister" Missionaries from Mexico who were our tour guides. They were very sweet and of course had a captive audience for the 30 minutes of LDS doctrine they had memorized. Members of the church from all over the world apply to "volunteer" for 18 months at their own expense (except for a nominal stipend from the church) and if chosen have no control over where they are sent. Mostly girls go to SLC Temple as tour guides and mostly men go out into the world as "door knockers" (their words not mine). When they come to the USA, they have two months to learn English before they are assigned their duties. They did very well.