I am looking for items related to Apollo 1, Rocket inventors (Wernher Von Braun), Challenger and Colombia space shuttle disasters.

Apollo 1: Gus Grissom, Ed White, and Roger B. Chaffee

Rocket Inventor: Werner Von Braun

Space Shuttle Challenger disaster: Gregory Jarvis

Space Shuttle Columbia disaster: William McCool, Michael P. Anderson, David M. Brown, Laurel Clark, Ilan Ramon

Would be interested in signed photos, letters. SIgned photos can be invidualized. For items, would also look at group signed photos potentially. 

I look forward to seeing what items are for offer. 

David