In 1952 the USAF was testing two YRF-84F FICON (FIghter CONveyor) prototypes, one of which is currently stored at the NMUSAF - see my 1973 photo. Orders were placed for 25 RF-84Ks, while ten B-36s were converted into GRB-36 carriers. The RF-84K now on display in the marks of the 91st SRS (with which it operated between 1955 and 1957) may have been used for a short time for deep penetration reconnaissance flights into the USSR, started and recovered from its mother ship. As more capable aircraft rendered the awkward concept obsolete, the RF-84Ks joined regular land-based RF-84Fs