(Date and year unknown) - Erection of the two-stage Titan II booster. First stage XLR-87 booster produces 430-thousand pounds of thrust and the second stage XLR-91 produces 100-thousand pounds of thrust. They are being mated in preparation for the second in the series of the National Aeronautics and Space Administration's Gemini program to test the structural compatability of the spacecraft and the Gemini launch vehicle (Titan II) combination from launch through orbital insertion.