B-25 Mitchells, including (serial number 41-12863) of the 340th Bomb Group, 12th Air Force fly in formation with Baltimore Mark IIIAs of No. 232 Wing RAF during a mission over Tunisia. Printed caption on reverse: 'BOMBS ON THE MARETH LINE: ALLIED AIR FORCES' "SHUTTLE SERVICE" From the beggining of the air offensive against the Mareth Line on March 19, the Allies Air Forces have been striking at airfields, transport and enemy positions every day. the attacks made by light bombers operating from forward bases in Tripolitania and Tunisia have already reached an intensity greater than that which preceded the El Alamein offensive. Picture shows: Mitchell B-25 Bombers of the USAAF and Baltimore bombers of the South African Air Force flying together in formation on their way to attack Rommel's positions in North Africa.'