what is the duty of a color guard?

The duty of a Color Guard is to render honors when the national anthem is played or sung, when passing in review during a parade, or in certain other circumstances such as a funeral or an inauguration.

This photograph shows the rendering of honors by the Minneapolis Police Color Guard at the 2018 Mayoral Inauguration.

The US Flag is always to be handled with reverence and in accordance to the rules set down in the United States Flag Code and in US Law.

It is important for all of us to understand the rules for the proper handling of the US Flag and here is a link to learn more: https://www.usa.gov/flag