Balchen led a bombing raid that destroyed the only German outpost remaining on Greenland, a forward station at Sabine Island on the eastern coast of that island. This destruction hindered the ability of the German armed forces to maintain a presence on Greenland that not only had been used to send deceptive radio messages to Allied aircraft as well as establishing a weather station required to provide accurate weather reports for the German forces operating in the North Atlantic. Balchen then was posted to the European Theatre to run "Operation Where and When", based at Luleå-Kallax Air Base in northern Sweden. Balchen commanded a clandestine air transport operation, using 10 Douglas C-47s and helped to set up an escape route between the United Kingdom and Sweden that enabled numerous important diplomats and others to flee the Nazis. From March to December 1944, Balchen's "Operation Balder" using six B-24s manned with OSS crews, safely evacuated at least 2,000 Norwegians, 900 American internees and 150 internees of other nationalities from Sweden. Norwegian police troops were also airlifted from Sweden to Finnmark. The air operation also shipped strategic freight; from July to October 1944, 64 tons of operational supplies such as ammunition were transported from Scotland to the underground in occupied Norway. Life necessities like bales of hay and fodder for livestock were brought to areas in the north of Sweden and Norway, once even paradropping a hospital complete with a doctor and nurse. Between November 1944 and April 1945, Balchen also transported 200 tons of Arctic equipment and operational supplies from England to Sweden that were used to make secret overland transport from Sweden to Norway possible. During winter 1945, Balchen shipped communications equipment into northern Norway that was of inestimable value to the Allied Expeditionary Force's intelligence operations. The leading Norwegian wartime ace Sven Heglund was acting military attaché and served with Balchen, later writing about his time at Kallax. Another Norwegian at Kallax during the same period, who became a good friend, was marine biologist and explorer-to-be Thor Heyerdahl, later of Ra I and II and Kon-Tiki fame. Postwar activities From November 1948 to January 1951, Balchen commanded the 10th Rescue Squadron of the U.S. Air Force, which was located in southern Alaska but which operated across all of Alaska and northern Canada rescuing crashed airmen. Balchen led this squadron in the development of the techniques that became widely used