How do they know the distance so they all line up.

Example https://en.m.wikipedia.org/wiki/At_attention

you are viewing a single comment's thread
view the rest of the comments
[–] 1 point 1 year ago*

🚶🚶🚶🚶

🚶‍♂️🚶‍♂️🚶‍♂️🚶‍♂️

🚶🚶🚶🚶

🚶‍♂️🚶‍♂️🚶‍♂️🚶‍♂️

  • source