[Amrit1]

(8th Air Force) First USAAF air operation over W Europe. 15th Bombardment Squadron (Light) flying 6 American-built Bostons belonging to No. 226 Squadron Royal Air Force, join a RAF low-level attack on De Koog (2 aircraft), Bergen/Alkamaar, Haanstede and Valkenberg (2 aircraft) Airfields in the Netherlands; 2 aircraft are lost, 1 damaged beyond repair and 1 damaged; 6 airmen are MIA. Aircraft flown by Captain Charles C Kegelman, Squadron Commander, is severely damaged, but Kegelman succeeds in bringing it back to base at Swanton Morley.

From: http://www.usaaf.net/chron/42/jul42.htm