This is one horror film plot that may be all too real: Billions of voracious ants are about to descend on the Houston area, destroying entire homes and anything else that gets in their way. Rasberry Crazy Ants, even more destructive and mobile than their angry cousins, fire ants, are just weeks away from descending on the largest city in Texas. Since 2008, the ants, which entomologists believe came to Texas from South America aboard a cargo ship in the 1930s, have expanded their presence to 27 counties from just eight. Once in a home, they zero in on electrical...