Peter O'Dowd

One of the busiest airports in the country is in the midst of a major upgrade that will bring local restaurants into a space typically reserved for mega-corporate chains. Nearly two dozen Phoenix culinary landmarks have landed space at Sky Harbor. But there is a cost. Rent at the airport is 10 times more expensive in some cases, and some small businesses have gone into a lot of debt to get their foot in the door.

A group of Phoenix charter schools is facing criticism for using a teaching tool based on the work of L. Ron Hubbard, best known for founding the Church of Scientology. The tool has concerned parents in other schools, but the Phoenix schools' leader insists it has nothing to do with the church.

The Chinese solar manufacturer Suntech has announced it is closing down its factory in Goodyear, Ariz. — the only one it has in the United States. The company says recent U.S. tariffs have made it too difficult to maintain its presence here.

With consecutive days of subfreezing temperatures, homeless shelters say they're short on supplies and their budgets are stretched. Meanwhile, farmers are working to fight freezing temperatures that could affect the size and quality of this year's crops.

Democrat Kyrsten Sinema, 36, is a former social worker who spent part of her childhood living in an abandoned gas station. To win her district, made up of almost equal parts Republicans, Democrats and independents, she had to focus on voters in the middle.

Phoenix suburbs are becoming a magnet for small universities. Five schools — Benedictine, Albright, Wilkes, Upper Iowa and Westminster — have announced plans for satellite campuses in downtown Mesa. And at least three more are coming to Peoria.

The Arizona city already logs more days over 100 degrees than any U.S. city, and climate researchers predict Phoenix will grow hotter still in the coming decades. Planners are taking the projections seriously, and are looking for ways to adapt the city and its residents to a hotter, drier reality.

Mexicans go to the polls July 1 to elect their next president, but it isn't just Mexicans who are interested in the outcome. For Americans living along the border, the future of Mexico affects their bottom line.

Supporters of the state's divisive immigration law say it has achieved one of its stated goals: Thousands of illegal immigrants have left. However, the real cause — and consequence — of such a demographic shift may be more complex.

A new poll of Arizona voters shows former Pennsylvania Senator Rick Santorum in a virtual tie with former Massachusetts Gov. Mitt Romney. Next week's Arizona primary is on the same day as Michigan's, but has received less attention. Santorum campaigned in the Phoenix area Tuesday ahead of Wednesday night's debate in Mesa.