Fair weather returned on
23 July, and
General Walker requested the
Fifth Air Force to fly an armed
reconnaissance of the
Kwang'ju-Nonsan area. 
The air reconnaissance carried out on 23 July was revealing. It showed that enemy forces had indeed begun a drive south from the estuary of the Kum River and were swinging east behind the left (west) flank of Eighth Army. 
On the basis of the time and space estimate given him on the 23rd and the aerial reconnaissance of the same date, General Walker realized that a major crisis was developing in a section far behind the lines, and at a time when constant enemy attack was pushing his front back.