Military helicopters
During the Vietnam War, helicopters proved their worth to the US military. With brave crews aboard, they hovered low in the skies to rescue pilots and soldiers who were frighteningly close to enemy forces. How fascinating to think that the first helicopters couldn't even stay upright! In this b...
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| Format: | BOOK |
| Language: | ENGLISH |
| Published: |
Gareth Stevens Pub
2013
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| Series: | Military machines |
| Subjects: |