| 31. | It was not immediately clear what caused the drones to crash.
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| 32. | Until Sunday, it was unknown whether the guerrillas had drones.
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| 33. | In the 21st century, unmanned drones are becoming increasingly commonplace.
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| 34. | If both sex alleles are identical, diploid drones are produced.
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| 35. | Honey bees detect and destroy diploid drones after the eggs hatch.
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| 36. | This mechanism consists of a loose bridge under a drone string.
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| 37. | A studio-created drone has been edited into these songs.
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| 38. | In drones ) that are forcibly driven out of the colony.
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| 39. | He was killed in a drone strike in Pakistan in 2009.
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| 40. | Saad was killed in a drone strike in Pakistan in 2009.
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