| For the most part, this technology culture appeared at the same time as the air service itself, due to the nature of heavier-than-air flight. |
| The Pacific and North Atlantic had never been fully crossed by heavier-than-air craft. |
| Actually, Augustus Moore Herring was quite a pioneer during the very earliest days of heavier-than-air flight. |
| It was, without shadow of doubt, the last word in the science and manufacture of a heavier-than-air machine. |
| But it would be unjust to claim for them entire priority in the field of the glider and the heavier-than-air machine. |
| Americans were the first to take weapons into the air in heavier-than-air flying machines. |
