echelon

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Why Are U.S. Elections Held on Tuesdays?

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12 Greek Gods and Goddesses

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A History of U.S. Presidential Elections in Maps

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12 Novels Considered the “Greatest Book Ever Written”

Vincent Van Gogh, Self Portrait. Oil on canvas, 1887.

Rediscovered Artists: 6 Big Names That Time Almost Forgot

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Secret Service Code Names of 11 U.S. Presidents

United States Electoral College votes by state

How Many Electoral College Votes Does Each U.S. State Have?

echelon

aviation

Learn about this topic in these articles:

formation flying

In formation flying
The echelon, with all wingmen on one side and a bit behind the leader, is one popular formation. In line abreast, or wall formation, all the planes are equally far forward, in line with the leader. A formation with equal numbers of wingmen on either side…
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