NASA contractor Rockwell started to build the Space Shuttle Challenger

It was difficult to remove and became one of the most memorable—and operationally challenging—features of working on the lunar surface

killing the crew of 7 astronauts

performed the active rendezvous and docking maneuver with Soyuz 5 and welcomed Yeliseyev and Khrunov aboard after their spacewalk transfer

The cover is hand-signed by the two complete Soyuz crews:

Soyuz TMA-18 - crewphoto Air Force NASA contractor Rockwell started toSoyuz TMA 18 crewphoto 6x4'' glossy hand signed by all three astronauts and cosmonauts incl. Tracy Caldwell Dyson, a tough signer! Mint condition.