Where in the World is Elder Zaitzeff?

How do mission calls get assigned? My husband had the idea that missionaries were just sorted into available openings and needs of the Church's missions on any given week, and my mentality was kinda like let's throw all the applications up in the air and see where they land. However, it was our good fortune that Elder Ronald A. Rasband gave a great talk called The Divine Call of A Missionary while we were waiting for our son to receive his call.  Since I was not at the Saturday Evening Session of General Conference, I was able to watch the video on line at the General Conference page of the website for The Church of Jesus Christ of Latter-day Saints. Elder Rasband's talk was inspiring and answered all our questions. It also enabled us to fully and confidently explain the process to our family and friends of other faiths.