Haboobs 鈥� huge dust storms 鈥� are hitting the city more often than they used to. Scorching temperatures, even by Arizona standards, and unusually dry conditions are combining to create more of the dirt clouds.

Millions of Chinese are moving from the countryside to fast-growing cities that are home to significant economic activity. Central China's Wuhan, home to about 10 million, is one of these places, a city little-known outside the country that's attracting foreigners and Chinese alike.

Interstate 81 has helped to make Syracuse, N.Y., a "20-minute city," where you can drive anywhere you need to quickly and easily. But the highway has also physically divided neighborhoods, separating the haves from the have-nots. Now, like other cities around the country with urban highways, Syracuse officials are rethinking whether aging interstates are worth preserving.