the biden administration has now admitted it was a tragic mistake. cnn found out the cia was warned civilians were involved seconds before it hit the target. nic robertson has more from kabul. >> reporter: christine, laura, i've been to the house now where the drone strike took place, spoken with the family there and they still can't understand why the drone operators didn't know there were children playing in that area. they had come out to see their father as they did every night when he got home. the family says they're happy they announced this was a mistake. the family knew he wasn't a member of isis k. they're pleased to see that. what they want to see is justice. they would like whoever was to be held responsible for this, for it to go through a thorough