In the first image, the 99th FS is approaching enemy territory in Sicily, Italy. Fighter planes are surrounding the bomber plane to protect it.
The second image shows the bombs successfully being dropped on Sicily and the Red Tails leaving.
The third image shows the German airforce attacking the leaving Red Tails from above. They shot at the planes and two Red Tails went down, but Charles Hall swooped behind an enemy plane and became the first African American US military pilot to down a plane. The German planes retreated.