Inside America's toughest jail Grim ... Tent City in ArizonaPictures: MARK PETERMAN From HARRY MACADAM in ArizonaApril 28, 2007 HIGH above the Arizona desert, a pink neon sign flashes the word “vacancy” from a watch tower manned by armed guards. Surrounded by 25ft barbed wire fences, this is the welcome offered by America’s toughest jail — Tent City in Phoenix.Inside, nearly 1,000 prisoners live in army surplus tents, baking in temperatures of 122°F (50°C) in summer and freezing during winter.No matter how many criminals are locked up here, the vacancy sign is never...