S-37 Berkut [Russia]
The S-37 Berkut is an unusual break away from the regular swept-back wing aircrafts that the Russian company - Sukhoi has begun developing. The foward-swept wings of the S-37 make it unstable at low speeds. Probably, the Russians, like the Americans working on the X-29, are hoping to utilise that unstability to create a jet that has performance of being more manoeuvrable.