English: Artist Robert McCall of Paradise Valley, Arizona, holds a sheet of commemorative postage stamps commemorating the Apollo 15 lunar landing mission. McCall was chosen by the U.S. Postal Service to design the eight-cent stamp which heralds: "United States in Space – A Decade of Achievement." McCall, who has maintained a close tie with the space program for many years, has been commissioned by the National Aeronautics and Space Administration to portray Apollo 15 activities from the Mission Control Center at the Manned Spacecraft Center, Houston, Texas.