Ants Invade Houston, Eat Computers – Living on The Huffington Post

So some sorts of ants came to the USA, stowed away in the cargo hold of a ship, seeking out a better life for themselves.  But they are in HUGE numbers and eat everything, including fire ants (good) and electrical wires (bad).  But hey, they came to this country with a dream.  They work hard and are enterprising.  For example:

And when you do kill these ants, the survivors turn it to their advantage: They pile up the dead, sometimes using them as a bridge to cross safely over surfaces treated with pesticide.