Even in the best economy, the restaurant industry is all about struggle. Margins are incredibly tight and even the slightest change in one statistic can make life miserable for the finest of establishments. Restaurants have been taken down by rising food prices, lower walk-in customers, government investigations, and fast food chains in particular have swung from huge revenues to near-oblivion with shocking speed. Today we’re talking about 10 fast food chains that are in serious financial trouble.