I LOVE the Litany of the Saints. About a year or two ago, I participated in an act of reparation in NYC (there is a thread about it on FR somewhere) where the crowd chanted the Litany of the Saints in Latin, with the priest leading it, and hearing the chant echo through the canyons of the skyscrapers in NYC was quite moving.
Was it all chanted by the clergy/schola/choir or did the congregation take part in it?