Before the sun clears the towers on Central Avenue, downtown Phoenix is still cool enough to work in, and that is when the mowers start. Allied Universal® Security Services keeps the grass in the middle of the city — the green strips outside office blocks, the wide deck of lawn at Hance Park where the freeway runs along underneath. Summer here rewards an early start: by ten the shade has folded up and the day belongs to the sun. The payoff shows when the first commuters come up out of the tunnel — lines running straight, edges cut along the concrete, clippings swept off the walk. Block by block, it is how the Valley of the Sun looks after itself.