There are three stamps with my artwork in this set issued by Somalia in 2004. The stamp set was issued to honor the Mars Exploration Rover project but it does include two other future Mars missions. The one on the left shows the 2005 Mars Reconnaissance Orbiter (MRO) in lower left corner and the one on the right shows the 2007 Phoenix Mars Lander. Below is a Mars Exploration Rover with my Mars Aerobt Balloon on the right side.