A moment of silence, although reasonable on its surface, will be rejected by those pushing public prayer. The idea of leading a public meeting with an orchestrated 'christian' prayer is to show off the bonafides of the politicians and to proselytize. When I performed my student teaching internship many decades ago the school used a moment of silence since this was shortly on the heals of Engel vs. Vitale. The silent moment is a welcome one on several levels and the freedom to pray as one wishes, silently, is a great benefit to those who do not share the faith of the majority. This should be the fall back position of the SC but I'm not holding my breath.