The STS-105 and Expedition Three E3 crews grin as they exit the Operations and Checkout Building for a second launch attempt.

The STS-105 and Expedition Three (E3) crews grin as they exit the Operations and Checkout Building on their way to Launch Pad 39A for a second launch attempt. Leading the way are (left to right) Pilot Rick Sturckow and Commander Scott Horowitz; in the second row, Mission Specialists Patrick Forrester and Daniel Barry; in the third row, E3 cosmonaut Mikhail Tyurin, Commander Frank Culbertson, and cosmonaut Vladimir Dezhurov. Forrester and Tyurin are both making their first space flights. Launch countdown activities for the 12-day mission were called off at about 5:12 p.m. Aug. 9 during the T-9 minute hold due to the high potential for lightning, a thick cloud cover and the potential for showers. Launch is currently scheduled for 5:15 p.m. EDT Aug. 10. Highlighting the mission will be the rotation of the International Space Station crew, the third flight of an Italian-built Multi-Purpose Logistics Module delivering additional scientific racks, equipment and supplies for the Space Station, and two spacewalks. Included in the payload is the Early Ammonia Servicer (EAS) tank, which will be attached to the Station during the spacewalks. The EAS will be installed on the P6 truss, which holds the Station’s giant U.S. solar arrays, batteries and the cooling radiators. The EAS contains spare ammonia for the Station’s cooling system. The three-member Expedition Two crew will be returning to Earth aboard Discovery after a five-month stay on the Station