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The Pledge of Allegiance to the Flag:
"I pledge allegiance to the Flag of the United States of America, and to the Republic for which it stands, one Nation under God, indivisible, with liberty and justice for all.",
should be rendered by standing at attention facing the flag with the right hand over the heart. When not in uniform men should remove any non-religious headdress with their right hand and hold it at the left shoulder, the hand being over the heart. Persons in uniform should remain silent, face the flag, and render the military salute. Members of the Armed Forces not in uniform and veterans may render the military salute in the manner provided for persons in uniform.
(Added Pub. L. 105–225, §2(a), Aug. 12, 1998, 112 Stat. 1494; amended Pub. L. 107–293, §2(a), Nov. 13, 2002, 116 Stat. 2060; Pub. L. 113–66, div. A, title V, §586, Dec. 26, 2013, 127 Stat. 777.)
United States Code, 2018 Edition
Title 4 - FLAG AND SEAL, SEAT OF GOVERNMENT, AND THE STATES
CHAPTER 1 - THE FLAG
Sec. 4 - Pledge of allegiance to the flag; manner of delivery
From the U.S. Government Publishing Office, www.gpo.gov

The U.S. flag evolved from early colonial banners into the current 50-star design. The first official flag was established on June 14, 1777 (now celebrated as Flag Day), featuring 13 alternating stripes and 13 stars representing the original colonies. The design has been officially updated 27 times. The history of the Stars and Stripes is defined by key milestones:
History of the U.S. Flag, in Paper (a 4 minute YouTube video)
Why the Betsy Ross Flag Is a Myth (a 10 minute YouTube video)
AMVETS Post 115 hosts US Flag History & Retirement Ceremonies typically on or around "Flag Holidays". See the Events page for details.

To display the American flag properly, always ensure the Union (the blue field of stars) is at the top left from the viewer's perspective. It should never touch the ground, be worn as clothing, or be flown in severe weather unless it is an all-weather flag. The display guidelines vary depending on your setup:
Hanging on a Wall or Window
Flying on a Flagpole
For full federal guidelines and details on flag retirement, refer to the VFW Flag Etiquette guide or the VA.gov Flag Display Guidelines.
Flag etiquette dictates only flying your flag between sunrise and sunset unless it is properly illuminated. You should also take down Old Glory in the event of inclement weather except if it's an all-weather flag made out of a non-absorbent material like nylon. Only fly American flags in good condition, but as long as you follow these guidelines, your Stars and Stripes will last years to come.

Folding an American flag into a triangle is a ceremonial process that requires two people to keep the flag taut and ensure it never touches the ground. The final result should be a tight, triangular shape with only the blue field and white stars visible.
There are many websites and videos online with detailed instructions regarding how to properly fold the US flag. For example:
When an American flag is tattered or other unfit to be used, it should be disposed of by retirement. Retiring the flag with dignity requires, as outlined in the U.S. Flag Code, either burning or burying the flag. The most common approach is a dignified burning ceremony. If you are uncomfortable doing this yourself, local veteran posts and civic groups accept flags for proper disposal.
We recommend you bring the flag to be retired to our AMVETS Post 115 at 401 Veterans Drive or another veterans post. You can hand it to us when the post is open or leave it in the box labeled for that purpose in front of the post.
If you prefer you can retire the flag yourself, but bringing it to us, is easier for you and insures the flag if retired properly.
There are many websites and videos online with detailed instructions.

This section contains the following groups:
Scroll down to visit each.

AMVETS Post 115 hosts US Flag History & Retirement Ceremonies typically on or around "Flag Holidays" and provided color guards for other civic events. See the Events page for details.
Presidents' Day: Third Monday in February
Memorial Day: Last Monday in May
Juneteenth National Independence Day: June 19
Independence Day: July 4
Veterans Day: November 11
Flag Day: June 14
Patriot Day: September 11

At many Flag Retirement Ceremonies a History of the US Flag is presented by John W. Knox including dozens of flags from precolonial times through the present.
Among his credentials Mr. Knox is Commander of the Color Guard for the Texas Society of the Sons of the American Revolution and Past President of the Patrick Henry Chapter of the Sons of the American Revolution and a leading expert on the study of US Flags.
One of his "handouts" is a description of 24 of the many
Thirteen Star Flags & The Flag Resolution of June 14, 1776 (PDF)
...
When an American flag is tattered or other unfit to be used, it should be disposed of by retirement. Retiring the flag with dignity requires, as outlined in the U.S. Flag Code, either burning or burying the flag. The most common approach is a dignified burning ceremony. If you are uncomfortable doing this yourself, local veteran posts and civic groups accept flags for proper disposal.
We recommend you bring the flag to be retired to our AMVETS Post 115 at 401 Veterans Drive or another veterans post. You can hand it to us when the post is open or leave it in the box labeled for that purpose in front of the post.
If you prefer you can retire the flag yourself, but bringing it to us, is easier for you and insures the flag if retired properly.
There are many websites and videos online with detailed instructions.