AMERICA DEFENDS THE PANAMA CANAL.

AMERICA DEFENDS THE PANAMA CANAL. Some of the 48 huge patrol flying-boats of the United States Navy flying over the U.S.S. "Wright" (foreground), aircraft depot ship, as the United States Navy seeks the solution of Fleet Problem XX during the annual manoeuvres in the Puerto Rican area. The Problem is to determine the amount of defence needed in Puerto Rican and Panama areas in case of attack by a foreign power. The Navy planes are co-operating with 54 other planes, the Fleet Marine Force and battleships, cruisers, destroyers and submariners of the American Atlantic and Pacific Fleets.