Indeed Geoff
However, I am very sure few T-6 remained in use by 1962 (if any!) and if so were never called AT-6 by any of the US users
I have a final retirement date by the USAF of all their T-6 as 17 Sep 1956 at Bartow AFB in Florida, but I cannot say 100% that was just for training or it really was the last one out.
US Navy reportedly retired their last SNJ on 14 March 1958 at Barrin Field, Alabama.
The last T-6 in US service that I know of was used by 35th Air Rescue Squadron (a Civil Air Patrol unit) in the "1960s". Unfortunateley I don't know who they belonged to....
Small aircraft (drones etc) are still very difficult to intercept even in daytime.
That, however, is outside my main interest and we are already straying from the subject.
Cheers
Stig