The single prototype was assigned to the 2nd Bombardment Group at Langley Field , Virginia . Following the 24 January 1939 Chillán earthquake in Chile , the prototype flew a relief mission , carrying medical supplies . Commanded by Major Caleb V. Haynes , the aircraft carried of American Red Cross emergency supplies to Santiago , making only two stops along the way , at France Field in the Panama Canal Zone , and at Lima , Peru . Haynes was awarded the Distinguished Flying Cross and the Order of the Merit of Chile , and the whole crew earned the MacKay Trophy
1939 Chillán earthquake
1939 Chillán earthquake
Boeing XB-15