The delivery of three tonnes of ammonium nitrate to a group suspected of plotting terrorist attacks in southern Ontario was part of an undercover police sting operation, the Toronto Star has learned. The RCMP said yesterday that after investigating the alleged homegrown terrorist cell for months, they had to move quickly Friday night to arrest 12 men and five youths before the group could launch a bomb attack on Canadian soil. Sources say investigators who had learned of the group's alleged plan to build a bomb were controlling the sale and transport of the massive amount of fertilizer, a key...