Here's ATC audio sauce. 1m, 11m and 16m are noteworthy.
>>1921147 (lb)
Recordings archive: https://www.liveatc.net/search/?icao=kjfk
Audio file:
http://archive-server.liveatc.net/kjfk/KJFK-Gnd-Twr-Jun-26-2018-2330Z.mp3
Someone archive please. I can't at moment.
Through 17m I never heard ground/tower offer backup. 1205 offered backup at 1m in.