| 21. | This was Martin's 49th ( and last ) heavy bomber operation.
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| 22. | Heavy bombers could be heard flying toward the area late Saturday.
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| 23. | The forces are bolstered with 15 B-52 heavy bombers . prvs / vj
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| 24. | The group prepared for combat with Consolidated B-24 Liberator heavy bombers.
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| 25. | The United States has responded by ordering heavy bombers to Guam.
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| 26. | Significant damage was done to the factory producing the Short Stirling heavy bomber.
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| 27. | American heavy bomber units began arriving in the Middle East at this time.
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| 28. | A heavy bomber flies low, heading for a mission in the breakaway republic.
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| 29. | Afterwards the USAAF discontinued heavy bomber operations at Poltava for about a month.
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| 30. | Without matting, this airstrip was not capable of handling heavy bombers.
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