The bombing mission in the morning of February 15 , 1944 involved 142 Boeing B-17 Flying Fortresses heavy bombers followed by 47 North American B-25 Mitchell and 40 Martin B-26 Marauder medium bombers .
The bombing in the morning of February 15 , 1944 involved 142 Boeing B-17 Flying Fortresses heavy bombers followed by 47 North American B-25 Mitchell and 40 Martin B-26 Marauder medium bombers .