Firstly I will admit that while I am fascinated by aviation my knowledge is ...patchy to say the least, so excuse any daft question I ask. While listening to JFK on 29th at about 7am eastern there were a number of go-arounds on 22L(I think) - Air China and a Delta both went around once while a Jetblue aborted twice and diverted to Atlantic City. The rvr given by the tower controller was between 2500 & 3500 during this time - is this why aircraft had difficulty landing ? Does this also mean the ILS/glideslope was inoperable during this time ? Also 22R was not in service at this time so all departures backed up - am I correct in presuming that the controller could not release any departure traffic until the other traffic had been re-vectored for approach?
Sorry about the multiple questions but any help would be great.