Until I saw the part about the population over 250,000 I wouldn’t have placed El Paso on that list. It’s got a huge military presence that is going to be growing over the next few years, but it is on the border, and a lot of the folks that could moved from Juarez to El Paso to get away from the violence.
Source: http://www.city-data.com/city/El-Paso-Texas.html