Closer to Atlantis workers keep watch as the new block 2 engine nears its installation point.

As the giant forklift moves closer to Atlantis, workers keep watch as the new block 2 engine nears its installation point. The work is being done in the Orbiter Processing Facility bay 3. The engine will have its first flight on mission STS-104, scheduled for launch June 14. The Block II Main Engine configuration is manufactured by Boeing Rocketdyne in Canoga Park, Calif., and includes a new Pratt & Whitney high-pressure fuel turbo pump. Engine improvements are managed by NASA’s Marshall Space Flight Center in Huntsville, Ala. Each Space Shuttle Main Engine is 14 feet (4.3 meters) long, weighs about 7,000 pounds (3,175 kilograms), and is 7.5 feet (2.3 meters) in diameter at the end of the nozzle