With the tracking system for the Iridium satellite constellation on screen, 1st Lt. Daniel Moomey explains his knowledge of how the system works to Capt. Amy Ianacone and Airman Patrick Adams Jan. 7, 2010, at Vandenburg Air Force Base, Calif. The Joint Space Operations Center recently reached a milestone Dec. 18, 2009, increasing the number of active satellites tracked from 120 to approximately 1,150. Lieutenant Moomey, Captain Ianacone and Airman Adams are from the Joint Space Operations Center. (U.S. Air Force photo/Airman 1st Class Angelina Drake)