It may have been the Tabernacle or Conference center. I remember reading about it and being surprised but do not remember the exact location.
This is not the article...
The one I meant had four pages to it...
But this one is interesting...
Muslim clerics: We can learn from Mormons
“No other religious leaders offered that kind of support,” Gilliland recalled. “The Muslims are truly our friends.”
http://www.sltrib.com/ci_14382290?IADID=Search-www.sltrib.com-www.sltrib.com