On May 26 in Lincoln, Ontario, an unidentified man bought 1,500 kilograms (3,300 pounds) of ammonium nitrate, a type of fertilizer that can be used to make bombs. The ammonium nitrate in question remains unaccounted for just weeks before the G8 and G20 summits. Niagara Regional Police say the man who purchased the substance identified himself as a regular customer and loaded the fertilizer into his mini-van. Only after the purchase did the staff discover that the man was not a regular customer, prompting a police investigation. The fertilizer is the same kind that was used by Oklahoma City bomber Timothy McVeigh in 1995. It’s also the stuff the Toronto 18 terrorists plotted to use in 2006 to detonate three truck bombs.