How 9/11 changed Canadian airport security

A travelling parent with kids cannot take a 460-millilitre jar of peanut butter through airport security. It’s not an allergen issue, but rather it is too large: a spreadable food, treated like a liquid. But any number of containers of it less than 100 ml is OK.At one airport, a blazer comes off; at another, it stays on. The same thing with shoes and laptops, all according to the rules that can look arbitrary or capricious to onlookers.For Margaret Bloodworth, the former deputy minister o