The Viper jet is a heavy bomber aircraft suited to quickly destroy its targets. Its two powerful jet engines get it in and out in a hurry, and its optional air-to-air missiles and 20mm cannon help it in a dogfight. Most of this fighters missions are obviously scheduled at night, and it has one pilot.
The two engines are slightly separated to reduce the probability of both engines being damaged at once. (similar to the engine system of the f-14)
The Viper has a bit of a lower-lip problem. I like to think it shows the enemy we're not giving up.