A-3 Test Stand Construction at NASA's Stennis Space Center in in Hancock County, Mississippi. Nine water, isopropyl alcohol (IPA) and liquid oxygen (LOX) tanks have been delivered and installed, with five more water tanks scheduled to arrive in upcoming weeks. The two IPA tanks shown on the left and the three LOX tanks shown on the right are 35,000 gallons each. The four water tanks in the center are 39,000 gallons each. All 14 of the tanks will be used by the chemical steam generators units that will be installed on the A-3 stand for creating simulated altitudes of up to 100,000 feet, a testing environment for Constellation, initially to validate the performance of the J2-X engine for the upper stage of the new Ares I launch vehicle. (NASA/SSC) #