United States-Canada Joint Commission to Study Niagara Falls: HAMLS of buses arriving with delegates, falls in background. Shots of delegates listening, of acting chairman of United States side of international joint commission RB McWhorter speaking, pressing plunger to open work on American side. LS of explosion in water. Swish PAN to General AGL McNaughton speaking on Canadian side, driving symbolic stake with sledge hammer as Jean Lesage and Robert Saunders hold stake. HA PAN of top of Horseshoe Falls.