STS-51-L CHALLENGER DISASTER NASA ASTRONAUT DICK SCOBEE, SALLY RIDE, DAN BRANDENSTEIN & THAD THAGARD STS NASA ASTRONAUTS SIGNED VINTAGE 1981 COVER ***
*** ALL FOUR SIGNED IN BEAUTIFUL BLACK INK IN BEAUTIFUL CONDITION ***
*** SIGNED ON A VINTAGE FLIGHT READINESS FIRING SPACE SHUTTLE 1981 COVER IN BEAUTIFUL CONDITION ***
*** STEVE ZARELLI SPACE FULL LETTER AUTHENTICATION WITH MATCHING SERIAL NUMBER STICKER INCLUDED ***