The US Space Force has decommissioned the last two Defense Support Program satellites, ending a missile-launch early-warning program that operated for more than 55 years.

The last two remaining satellites were transported to an orbital graveyard as the program officially comes to an end.

The US Space Force has announced the retirement of the final two satellites from the half-century-old Defense Support Program (DSP). This constellation used infrared detectors to detect signs of ...

The new GPS exhibit, titled “Global Positioning System and its Impact!” occupies nearly 700 sq. ft. of floor space in the National Museum of the U.S. Air Force and takes the shape of a full-size ...