| 31. | 466 Sqn converted to the Handley Page Halifax heavy bomber in late 1943.
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| 32. | The squadron inactivated in April 1944 with the reduction of heavy bomber training.
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| 33. | It then became a heavy bomber training unit until 1944.
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| 34. | The 513th was undergoing B-29 very heavy bomber upgrade training.
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| 35. | Jos?Rizal University joined the Jose Rizal University Heavy Bombers.
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| 36. | This was done with three heavy bombers in January 1957.
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| 37. | This conversation coincided with the Gotha Raids in which German heavy bombers attacked London.
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| 38. | Owing to this it was called a heavy bomber rather than a medium bomber.
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| 39. | His final tally was 63 victories, including 3 heavy bombers.
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| 40. | The Fifth Air Force had two heavy bomber groups.
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