EX-10.23 15 dex1023.htm LETTER CONTRACT NO. GF80726B11 BETWEEN THE REGISTRANT AND LOCKHEED MARTIN CORP. Letter Contract SPACEHAB, Inc. Date: February 18, 2004 12130 Highway 3, Bldg. 1 Webster, TX 77598 Prime Contract No.: NNJ04AA03C Subject: LOCKHEED...