Photos: Delta 4 rocket fires off the pad before sunset

The demands of launching the first in an upgraded line of U.S. Air Force GPS navigation satellites, including a late load of extra fuel for the spacecraft and a military policy of reserving fuel to eliminate space junk, will keep SpaceX from recovering the first stage of its Falcon 9 rocket following liftoff Thursday from Cape Canaveral, according to mission managers.

SpaceX has concluded fatigue on an engine cover caused one of the nine Merlin 1D first stage engines on the company’s most recent launch to shut down early during ascent, leading to the loss of the booster during an offshore landing attempt in the Atlantic Ocean, an official said Monday.

A Falcon 9 rocket carrying the heaviest payload ever launched by SpaceX took off Monday morning from Cape Canaveral with 60 satellites for then company’s Starlink broadband network.