|Ibis V formation photo from|
|Cornerstone ancient building Internet photo|
|Internet pyramid photo|
“Drafting is used to reduce wind resistance and is seen most commonly in bicycle racing, car racing and speed-skating, though drafting is occasionally used even in cross-country skiing, cross-country skiing, downhill skateboarding and running….
|Racing cars photo from http://en.wikipedia.org/wiki/Drafting_(aerodynamics)|