Guinea-Bissau - Space Shuttle Challenger 4 Stamp Mint Sheet GB11206a

This is a beautiful sheet of 4 stamps, issued by Guinea-Bissau in 2011, commemorating the 25th anniversary of the 1986 tragedy of the Challenger Space Shuttle tragedy. Featured astronaut crew members shown include Mission Specialist & American astronaut Judith Resnik, NASA Payload Specialist Gregory Jarvis, National Aeronautics and Space Administration physicist Ronald McNair, Japanese American Mission Specialist Ellison Onizuka, space shuttle pilot Michael J. Smith, and the STS-7 NASA Space Shuttle Challenger. The sheet is Michel catalog #5308-11, and is Post Office fresh, mint never hinged, and F/VF.