American Aviators in Gross Country Flight FLYING CIRCUS" OF, THIRTEEN AIRPLANES MAKE TRIP FROM MINNEAPOLIS TO CHICAGO CHICAGO capture IBy Aiiociated Pren.J Chicago, Sept. 3.--Lieutenants . 9. M. Conriell and Earl Carroll, Amer- can aviator^ with the "flying circus" of thirteen British and American airplanes airplanes which has been giving exhibitions exhibitions in 'many cities, today flew from Minneapolis to Chicago, covering covering 420 miles in four and one-half hours. The remainder of the circus will arrive in Chicago early, tomorrow morning. Lieut. Connell brought with him first aer al mail between Minneapolis and Chicago, carrying letters to President President Wilson at. Wasulngton.