NEW from @CBSDavidMartin: A defense official says an investigation by the U.S. Central Command has determined that the 8/29 drone strike in Kabul, which Gen. Mark Milley described as a “righteous strike,” killed an aid worker along with 9 members of his family, + 7 children.

The official tells @CBSNews that the aid worker's movements corresponded with intelligence about ISIS plans for an attack at Kabul airport. A drone observed men loading what were thought to be explosives into the car, but they were loading water containers.

Addt'l from @CBSDavidMartin: The drone strike set off a large secondary explosion which officials originally said was evidence that the car was indeed carrying explosives but which the investigation determined was most likely set off by a propane tank located in the driveway.

Horrible!