So who ate all the snacks? Even by their gargantuan standards of over-indulgence, couch potato Americans are preparing to outdo themselves during today's Super Bowl, the sporting highlight of the country's year. They will guzzle their way through truckloads of crisps, peanuts, pretzels, popcorn, nachos, pizza, olives, biscuits, cheese and anything else they can find in the fridge. Britons may drink themselves silly during big games - Americans stuff themselves stupid. According to research by the US Calorie Control Council, gridiron fans will today eat 11 million pounds of crisps, 8m lbs of tortilla chips, 4m lbs of pretzels and...