Justen served a one-month mission as part of the 26-man technical crew at the Hill Cumorah Pageant.
He was set apart as a missionary,
helped build the set (his district built the part on the far right),
and ran a spotlight on Tower #1 -- 50 feet in the air (the tallest of 12 towers).
You can't see his tower in any of the pictures (it's three more to the left), but you can see his spotlight. His is the big, round one (left of center stage) that has the silhouette of a man (Abinadai) in it.