This is a rescue mission where you have to take-off with a DG-III from Cape Canaveral and intercept another DG-III which is approaching Earth at 40 km/s (!), unable to fire any of its thrusters. You have around two and a half hours to dock with it, push it away from its fatal trajectory, and decelerate it into a suitable re-entry orbit, so that you can use its still-working airfoils to perform a totally unpowered aerobraking and landing maneuver in Cape Canaveral. Good luck.
Difficulty: Quite hard
You need the DeltaGlider III for this scenario. Set fuel reserves and engine power to maximum, or you won't stand a chance.