SLC-3E
Three successful Atlas IIAS missions were flown from SLC-3E. The first mission, flown on December 18, 1999, launched the Terra satellite. The other two launched satellites in the Naval Ocean Surveillance System, USA 160 and USA 173. The final Atlas IIAS mission from SLC-3E was launched on December 2, 2003.
It was reported in 2003 that SLC-3E would be overhauled to serve as a launch platform for the Atlas V rocket after plans to build two Delta IV launch platforms were put on hold. Renovations of SLC-3E, which began after a January 2004 ground breaking ceremony, included raising the Mobile Service Tower roof by approximately 30 ft (9.1 m), to a height of 239 ft (73 m). The tower can thus accommodate an Atlas V 500 series vehicle with its larger payload fairing. In July 2004 Lockheed Martin announced the arrival of the fourth and final segment of the fixed launch platform (FLP). The segments had been transported from a fabrication facility in Oak Hill, FL, 3,500 miles (5,600 km) away. The largest segment weighed 90 tons and, "is thought to be the biggest over-the-road shipment ever attempted cross-country." In February 2005 the activations team handed over the launch pad to the operational team, marking the end of major reconstruction. The first Atlas V launch from SLC-3E took place at 10:02 GMT on March 13, 2008.
Read more about this topic: Vandenberg AFB Space Launch Complex 3