A remarkably entertaining letter to the editor of the FT recommends that the United States invade Canada before Russia or China gets the idea: “Conquering Canada would be easy – on any day, there are more tyres on cars in Manhattan than there are Canadians. As with Iraq, it is simply a matter of showing that Canada is harbouring weapons of mass destruction and building nuclear weapons. Falsified discovery of “yellowcake” from Niger will not be necessary as a pretext for invasion. Canada has dangerous “yellow snow”, secretly deposited by Canadian men in winter. “Don’t eat the yellow snow” is a warning every child is given from birth.” Check out the rest after the jump.