The loss of the two airfields , at Pitomnik on 16 January 1943 and Gumrak on the night of 21\/22 January , meant an end to air supplies and to the evacuation of the wounded .
The loss of the two airfields , at Pitomnik on 16 January 1943 and Gumrak on the night of 21\/22 January , meant an end to air supplies and to the flying out the wounded .