Gen. Savage tells Pappy Hartley that the next target will be the submarine pens at St. Nazaire, but when the stock bombing footage is shown when the mission is flown, the bombs are exploding in the countryside. Submarine pens were concrete structures on the coast.
When "Pappy" is landing the B17 at the beginning, the left main tire is clearly blown out and shredded. When the aircraft is stopped and the pilot and General Savage are in front of the aircraft, the left main tire clearly has no damage and is fully inflated.