This picture shows a B-25 of the 5th Air Force attacking a Japanese merchant ship during an attack on Wewak Harbor, a base in New Guinea providing supplies to Salamaua and Lae. The B-25’s bombs have just missed the ship, which is shooting back at its attackers, as evident by the black puffs of flak. The B-25 was the main bomber of the 5th Air Force, which modified many of these bombers to have an extra 4-8 machine guns located on the nose of the plane for concentrated fire on strafing attacks.